But some weeds with heart-shaped leaves and brightly colored flowers are not the best ornamentals. Instead, they are invasive plants that can choke good plants.

However, some, such as the Wild Violet, produce purple flowers in the spring, and you can use them as ground cover or in rock gardens. 

Here are ten plants that have heart-shaped leaves.

1. Velvetleaf

• Scientific Name: Abutilon theophrasti
• Family: Malvaceae
• Annual or Perennial: Annual
• Native Range: Southern Asia

Velvetleaf is one of the many weeds with heart-shaped leaves. It is an annual plant native to Southern Asia and grows during the warmer seasons and germinates in the spring, with the flowers appearing in the summer.

Velvetleaf grows to a height of up to eight feet. It has branched stout stems covered in downy hairs. Also, the plant has large and heart-shaped leaves with pointed tips at their ends.

Velvetleaf has bright yellow flowers with five petals attached at the base. All the flowers grow in clusters or individually on stalks.

Velvetleaf spreads through seeds that can remain dormant and viable for many years. Therefore, the best way to eliminate them is to use a pre-emergent herbicide.

2. Black Bindweed

• Scientific Name: Fallopia convolvulus
• Family: Polygonaceae
• Annual or Perennial: Annual
• Native Range: Europe, Asia, and Northern Africa

Black bindweed is a fast-growing annual weed native throughout Europe, Asia, and Northern Africa. It is among the many invasive outdoor plants with heart-shaped leaves.

Black bindweed grows to a height of up to 1.5 meters. It has alternate, broad, heart-shaped leaves with a petiole. Also, its flowers are small and can be greenish pink or greenish white.

When the stems of black bindweed grow, they twine clockwise around the stems of other good plants.

You can prevent this by applying an herbicide like glyphosate to the plant in the fall when it is actively growing. However, treatment should be continuous to reduce seed production.

3. Hairy Bittercress

• Scientific Name: Cardamine hirsuta
• Family: Brassicaceae
• Annual or Perennial: Annual or Biennial
• Native Range: Western Asia

Hairy Bittercress is an annual and sometimes biennial weed native to Western Asia. Although it is an invasive plant, some countries use it as food in green salads.

Hairy Bittercress grows to a height of up to 12 inches. The plant is usually erect with branches near the base.

The leaves of the Hairy Bittercress weed grow in a rosette at the base of the stem. They have up to 15 leaflets and are ovate. Also, the plant has white flowers with white petals.

When Hairy Bittercress becomes invasive, hand pulling or hoeing becomes the best method to remove them. Alternatively, use a pre-emergent to prevent its regrowth.

4. Bermuda Buttercup

• Scientific Name: Oxalis pes-caprae
• Family: Oxalidaceae
• Annual or Perennial: Perennial
• Native Range: South Africa

Bermuda Buttercup is a perennial weed native to South Africa. It is a small plant with heart-shaped leaves because it can only grow to a height of 45 centimeters.

Bermuda Buttercup is easily identifiable because of its brightly-colored yellow flowers composed of five petals. The plant has a short vertical stem attached to a pale brown underground bulb.

Bermuda Buttercup has clover-like leaves shaped like a heart arising from an enlarged basal stem tip. Each leaflet has a hairy lower surface.

Bermuda Buttercup is an invasive weed that can be difficult to control mechanically. Therefore, chemical application is effective in killing it.

5. Sweet Violet

• Scientific Name: Viola odorata
• Family: Violaceae
• Annual or Perennial: Perennial
• Native Range: Europe and Asia

Sweet Violet is a perennial weed native to Europe and Asia. The plant blooms in the late winter and early spring.

Sweet Violet is a low-growing plant with hairy, heart-shaped leaves and a deep green color. It has purple or blue-violet flowers with five oval petals. However, the plant sometimes has white or lilac flowers.

Sweet Violet has a long taproot system and is among wild plants with heart-shaped leaves. Therefore, you can eliminate it by hand pulling to remove the roots. But a permanent solution involves applying a herbicide.

6. Japanese Morning Glory

• Scientific Name: Ipomoea nil
• Family: Convolvulaceae
• Annual or Perennial: Annual or Perennial
• Native Range: Tropical Americas (Central America and Mexico)

Japanese Morning Glory is technically a perennial plant. But depending on the climate where it is naturalized, the plant can be an annual.

Despite its name, Japanese Morning Glory is not native to Japan. Instead, it is native to tropical Americas, especially Central America and Mexico.

Japanese Morning Glory is a climber with twinning stems. Its stems can twine up to five centimeters.

Also, it has ovate to circular leaves, with their base heart-shaped. Japanese Morning Glory produces blue to reddish-purple flowers with whitish tubes.

The plant can be invasive in fertile soils. Thus, you can remove it by hoeing or applying a chemical solution.

7. Henbit deadnettle

• Scientific Name: Lamium amplexicaule
• Family: Lamiaceae
• Annual or Perennial: Annual
• Native Range: Europe, Asia, Northern Africa

Henbit deadnettle is an annual weed native to Europe, Asia, and Northern Africa. The plant grows to a height of 9.8 inches with a soft, finely hairy stem.

Henbit deadnettle has rounded, heart-shaped leaves with lobbed margins on opposite ends. It produces pink to purple flowers that emerge from the step where the leaf joins the stem.

Henbit deadnettle has seeds that germinate in the fall. Thus, the plant flowers early in the spring.

You can eliminate Henbit deadnettle before its seeds germinate using a herbicide. Hand pulling or hoeing can also remove its roots if it has invaded. We discussed the best henbit elimination methods earlier.

8. Yellow Wood Sorrel

• Scientific Name: Oxalis stricta
• Family: Oxalidaceae
• Annual or Perennial: Annual and Perennial
• Native Range: North America, Eurasia

Yellow Wood Sorrel is an annual and perennial weed native to North America and Eurasia. The plant is a low-lying weed that can grow up to 38 centimeters tall.

Yellow Wood Sorrel is easily recognizable because of its light-green, clover- or heart-shaped leaves. It has small, delicate flowers that are yellow.

Yellow Wood Sorrel spreads by the seed. Its seeds can disperse up to four meters away.

The best way to deal with Yellow Wood Sorrel is to hoe it or hand pull it before it sets seed or flowers. Since it requires full sun to grow, you can smother it with a deep layer of soil or mulch.

9. Creeping Charlie

• Scientific Name: Glechoma hederacea
• Family: Lamiaceae
• Annual or Perennial: Perennial
• Native Range: Europe

Creeping Charlie is a ground-cover plant with heart-shaped leaves. It is a perennial weed native to Europe but naturalized worldwide.

Creeping Charlie has heart-shaped toothed leaves and purple flowers. Its petioles are long and attached to square stems rooting at the nodes.

It is an invasive weed in North America that spreads by stolon or seeds. It grows aggressively and can kill other plants that come in contact with it.

Creeping Charlie has an extensive root system that can be challenging to eradicate through mechanical means like hand pulling or hoeing. 

Therefore, chemical control is the only effective method of eliminating Creeping Charlie.

10. Giant Knotweed

• Scientific Name: Reynoutria sachalinensis
• Family: Polygonaceae
• Native Range: Asia, Russia

Giant Knotweed is a perennial plant native to Asia and Russia. The plant grows to a height of four meters with strong, extensively spreading rhizomes.

Giant Knotweed has small, sparse, greenish flowers with heart-shaped leaves and a crenate margin. Its stem is upright, round, and hollow with swollen nodes resembling bamboo shoots.

Giant Knotweed spreads through rhizomes. If it invades your garden, you can remove it through hand-pulling. However, chemical control is more effective in preventing its regrowth.

11. Asarabacca

• Scientific Name: Asarum europaeum
• Family: Aristolochiaceae
• Annual or Perennial: Perennial
• Native Range: Europe

Asarabacca, or European wild ginger, is a perennial weed native to Europe. The plant has stems that grow to 15 centimeters, each with two leaves.

Asarabacca has heart-shaped dark green and glossy leaves. The plant has solitary flowers that are brownish towards their ends and dark purple toward the center.

You can remove Asarabacca by hand pulling or hoeing. Chemical application is also effective in eliminating the weed.

Have your say?

Which weeds with heart-shaped leaves and brightly colored flowers have you maintained in your garden? 

Carla Etheridge

Carla is a student pursuing a B.S in Agricultural Systems Technology. With a passion for landscaping for over 4 years, Carla loves plants. She has previously contributed to several other sites in the space before joining InsightWeeds.

The post List of weeds with heart-shaped leaves appeared first on InsightWeeds.

One distinct way to tell weeds apart is to have a higher germination rate and have deep roots. However, it is not always easy to distinguish weeds from other plants because some look like small trees.

You might be tempted to leave the foreign tree that has started forming in your garden to grow, not knowing it is an invasive plant.

On the other hand, not every weed is dangerous; some are even willingly grown for their beneficial properties.

In this article, I have outlined several weeds that look like small trees to aid you in recognizing them.

1. Japanese knotweed

Japanese knotweed is one of the most invasive weeds in your garden. Furthermore, it spreads very fast and is extremely hard to control.

Therefore, I would advise you to get rid of it as soon as possible. It is so dangerous that it appeared on the world conservation union’s list of the world’s most invasive species.

Though it is a native Japanese plant, it has recently been sighted in different parts of the USA. Since most people do not know how dangerous it can be, homeowners have a hard time selling homes with the said weed in their garden and front yard.

At first sight, you can mistake it for a shrub due to its stout height and shape. On average, it measures anything between three to eight feet.

Its zig-zag stems are reddish and appear somehow jointed. Depending on the weather, this weed sometimes produces white-coloured panicles of flowers.

2. Southern magnolia

The Sothern magnolia is not your typical weed tree. However, it is grown in many parts of the world for its fragrant flowers and aesthetic.

This weed is easily distinguishable because of its creamy white flowers with yellow hues and thick brown bark, often peeling.

The problem with this tree is that it can grow very tall if left unchecked. In addition, its extensive roots knot together in the soil when it matures, crowding out other plants’ root systems.

Also, Southern magnolia requires a lot of nutrients to flourish, meaning there wouldn’t be a lot of nutrients left for other plants, making them harmful to some extent.

3. Willow trees

A willow tree is perfect for a massive farm as it has thick leaves that offer shade and is aesthetically pleasing.

Some people in Australia plant is entirely for wood as it makes beautiful furniture and figurines. It is also planted in flooded areas to drain the excess water.

However, it is not ideal for small gardens, parks, and backyards since its roots have the potential to grow up to 40 feet long.

Besides starving out the rest of the ecosystem, the roots will destroy the foundation of buildings, walkways, drains, and roads.

You can quickly identify a willow tree by its whitish bark with black patches, slender branches, and strong roots.

4. Hybrid poplar trees

Hybrid polar trees have very distinct compound leaves that are green with a yellow border. As the plant matures, the whole leaf turns yellow, then falls off, and the cycle repeats itself.

They have weed barks which often end up collapsing. The problem is the root system is very secure, so the plant will continually regrow.

If left to grow, your whole farm will have wilted-looking plants half the time.

5. Norway maple

As you can already tell from the name, the Norway maple is a native tree from Norway. So if you are looking for an aesthetic tree, this one will work perfectly.

The problem is it is very invasive and will starve other trees of nutrients, causing them to wither away.

The Norway maple is mainly grown for its aesthetic nature as it has broad dark green leaves that turn yellow in the fall and bears beautiful green-yellow non-edible fruits.

They will often appear in hedgerows or wooded areas, so keep an eye out.

6. Trees of heaven

Do not be fooled by the name; the tree of heaven is one of the most invasive weeds native to China but has now invaded Northern America.

It quickly multiplies by sprouting side shoots from the rootstalk, which go on and become a whole other plant.

The tree of heaven is dangerous because it releases toxins into the soil, eliminating an entire ecosystem in a short time.

Also, its leaves can cause painful rashes when they come into contact with human skin making it even harder to eliminate.

In the right conditions, this weed can grow up to 5 feet tall in one season and go on to reach 60 feet. This makes it one of the tallest weeds.

You can quickly tell it apart because of its tiny white flowers and fern-like leaves. Also, it emits a very odorous smell that is hard to miss.

7. Ricinus

Ricinus is a gorgeous plant, but it is equally dangerous. It can grow as tall as 4 feet in the right conditions, but it usually only averages 32 feet.

In addition, its flowers, leaves, and seeds produce a toxic chemical called ricin which is lethal if ingested by animals and humans, making it very dangerous for farm and wild animals.

8. Black locust

The Black locust is one of the fastest-growing weeds in the legume family. It is highly invasive and reproduces by seeds then dispersed by winds. It will have colonized your garden within no time and disrupted the ecosystem.

Most of the time, you will find Black locusts in a place with well-drained soil with a PH ranging from four to eight.

Its size mimics a small tree as its average height is 3 feet. In spring, it produces clusters of white flowers with a pleasant smell.

Also, they have pinnate compound leaves. Their leaves are their most distinguishable feature but check the bark, reddish, almost black, if you are unsure.

9. White mulberry

White mulberry is an invasive weed-like tree native to China but has recently spread to other areas.

Unfortunately, it is hard to get rid of because it is resistant to most herbicides and salt and can thrive in drought conditions. Ideally, this plant prefers warm and moist loamy soil but can grow anywhere.

You can tell it apart from its leaves because they grow in alternate arrangements, taking different structures such as serrate and dentate.

Its flowers are tiny and appear green in colour when young, then blossom to white when fully grown.

If left unchecked, the White mulberry is invasive and can colonize your garden in two seasons.

In addition, it looks like a small tree when matured, making it easy to mistake it for a beneficial tree.

10. Creeping thistle

The creeping thistle is relatively easy to spot, thanks to its distinct features. So naturally, it is a short weed of 2-5 feet.

It has purple flowers that look like nutcrackers with flowers at the top. Although it is a significant food source for farm birds, it can be invasive in your garden if left to grow.

Conclusion

It is not easy to differentiate weeds from other plants because some look like small trees. Japanese knotweed, southern magnolia, willow trees, hybrid polar trees, Norway tree Marple, trees of heaven, Ricinus, black locust, creeping thistle, and white mulberry are some of the weeds that look like trees.

However, not every weed is harmful; some are willingly grown for their beneficial properties.

Related Posts

• Weeds that look like tomato plants
• Weeds that look like rhubarb
• How to use gasoline to kill weeds

Carla Etheridge

Carla is a student pursuing a B.S in Agricultural Systems Technology. With a passion for landscaping for over 4 years, Carla loves plants. She has previously contributed to several other sites in the space before joining InsightWeeds.

The post 10 weeds that look like small trees appeared first on InsightWeeds.

However, tall weeds are another thing altogether. Due to their height and thick stalks, they look like actual trees. As such, you are likely to let them continue growing.

But make no mistake! Despite their appearance, large weeds that look like trees can be highly invasive. If left to grow, you risk creating an uncontrolled infestation in your garden.

On top of that, some of these plant-like weeds can be very aggressive – by depleting nutrients for your garden plants.

It is, therefore, necessary to identify any unknown giant weeds growing in your garden. You can choose the most appropriate solution for eradicating them by doing so.

Below, we have compiled a list of some of the most common tall weeds with thick stalks you will likely encounter in your garden.

1. Paulownia tree (Paulownia tomentosa)

The paulownia tree, also known as the princess or empress tree, is a fast-growing plant from the Paulowniaceae family.

The plant is native to Asia and was introduced to other parts of the world for its ornamental benefits. However, it is considered an invasive weed due to its fast growth.

Paulownia is a tall-growing plant, one of the tall weeds that look like trees – it can reach as high as 30 meters when mature. It has large leaves and a thick stalk even when young.

Another distinguishing feature of the empress tree is its flowers – there aren’t many tall weeds with purple flowers.

2. Pokeweed (Phytolacca Americana)

Pokeweed, also known as American pokeweed, is a perennial weed that is common in the North American region and Europe, and Asia.

It is an invasive weed with an extensive taproot system, making it challenging to eradicate. The plant is also highly poisonous to humans, animals, and pets.

Pokeweed is a tall-growing plant – reaching up to 10 feet. It is one of the most common weeds with thick herbaceous stalks.

As such, it resembles a shrub or a young tree. You can identify the weed by its reddish stem, small, white flowers, and green, lance-shaped leaves.

Another unique feature of the weed is its berries. When unripe and young, the fruits are green. As they mature, they turn into a dark shade of purple.

3. Bittersweet nightshade (Solanum dulcamara)

Bittersweet nightshade is an herbaceous, perennial vine plant. It grows in a wide range of areas, from gardens to hedges, marsh areas, woods, and other areas.

It is not considered a weed in some areas but can be invasive – spreading through seeds, creeping stems, and root systems.

Bittersweet nightshade is a high-growing tree that can reach up to 30 feet tall. It tends to climb over small trees, shrubs, and plants. Its branches can also grow low, forming a horizontal thicket.

Bittersweet nightshade has large, green leaves with purple tinges. It produces purple flowers (blooming around May to September) with a yellow stamen.

The weed plant also bears egg-shaped berries, which turn from green to orange and then red as they ripen.

4. Castor bean (Ricinus communis)

Castor bean plant, also known as the castor oil plant or Ricinus is a tall, fast-growing shrub-like plant. It is native to the African and Asian regions but has spread worldwide – introduced to new areas as an ornamental plant.

Ricinus plant grows pretty high, reaching heights of 12 meters. It has a thick stem with a purple-to-reddish color. It also sports huge leaves, whose shape appears like an open palm.

The leaves are shiny and have a dark reddish or purple color, which transforms into dark green as the plant matures.

Castor oil is not considered a weed in some areas and is even grown for its beauty or medicinal properties. However, it can establish itself in a place and become invasive.

Furthermore, the highly toxic plant produces a poisonous ricin compound that can seep into the soil and interfere with other plants.

5. Japanese knotweed (Reynoutria japonica)

Japanese knotweed, also known as Asian knotweed, is an herbaceous plant originating from the Polygonaceae family (knotweeds and buckwheat). It is native to Asia but is found worldwide, particularly in Europe and North America.

The Japanese knotweed is one of those tall weeds with thick hollow stalks that can reach up to 4 meters high. The stems are green in color and have raised nodes – just like in bamboo stems.

The leaves are large, green, and heart-shaped but with a truncated base. In the summer and fall seasons, the weed also produces small, white, or cream flowers that shoot from upright stamens.

If you find this weed in your garden, follow this removal guide if you prefer natural methods or use any of these chemicals.

6. Western dock (Rumex occidentalis)

The western dock is a flowering plant that is native to the North American region. It is perennial, grows from a robust taproot system. It has medicinal uses, and the leaves and stems are both edible.

Western dock grows primarily forms a single, upright, reddish-brown stem that can reach up to 6 feet. The leaves are bright green, triangular, and blade-like in shape and have a truncated base.

They are somewhat similar to curly dock weed, except it is longer, pointed at the apex, and not as wavy. Instead, they are pretty identical to leaves from some species of spinach.

While the western dock plant is pretty beneficial, letting it grow in your garden might not be the best idea. It produces several seeds, which can cause a massive infestation.

It is also tough and can resist harsh climatic conditions once it reaches maturity. Therefore, if unchecked, eradicating it can be a monumental task.

7. Wild lettuce (Lactuca virosa)

Wild lettuce is the common name given to several lettuce species closely related to cultivated lettuce.

The most common of these species is the Lactuca virosa plant, which goes by several local names – bitter lettuce, opium lettuce, and great lettuce, among others.

Wild lettuce is native to Africa (northern regions), Asia, and Europe but has naturalized worldwide. It is one of the large weeds, reaching heights of up to 2.5 meters.

It has a single, thick, erect stem, which becomes pretty robust as the plant matures. The stalk is green in color but can range from brownish red, greyish green, and purple, depending on the species.

You can also identify wild lettuce by its leaves. They are green in color, thick, and elongated. They also have serrated edges and a strong vein along the midline.

The plant produces a white sap with analgesic and sedative properties, hence the opium lettuce.

8. Butterfly bush (Buddleia davidii)

Butterfly bush is a fast-growing flowering plant native to Asia and the Americas but common in most parts of the world.

It is a deciduous plant with arching bushes that can reach up to 15 feet. Therefore, it is one of those weeds that look like small trees.

Butterfly bush has green hairy stems when young and grey-brown and peeling as the plant matures. The leaves are dark green to blue-grey and usually have short hairs on the underside.

However, the most distinctive feature of the weed is its flowers. It produces showy flowers that grow spikes at the stem’s end.

They come in various colors, from pink to white, dark purple, orange, and yellow.

Butterfly bush can be cultivated as a flowering plant due to its attractive blossoms. However, it is an aggressive plant that can tolerate harsh conditions. If uncontrolled, it can overcrowd and overwhelm native plants.

9. Indian Hemp/dogbane (Apocynum cannabinum)

Hemp dogbane is a herbaceous perennial plant that is common in North America – throughout the US and southern parts of Canada.

It is a highly poisonous plant, particularly to dogs and livestock, but it can even be fatal if ingested by human beings.

It goes by several local names – Amy root, Indian hemp, Indian psychic, and rheumatism weed. The phrase “hemp” is used due to its similarity to the cannabis plant as a source of fiber – it does not have psychoactive properties.

Hemp dogbane is a large weed plant that grows as high as 2 meters. These weeds have thick, reddish stalks and produce a milky sap that can cause skin irritation. Its leaves are large, lanceolate-shaped, and grow in an opposite formation.

They are green in color with a smooth top surface and hairy underside. Hemp dogbane also produces large white flowers that bloom during summer.

10. Creeping thistle (Cirsium arvense)

Creeping thistle is a perennial flowering plant native to Asia, Europe, and northern parts of Africa.

However, it has been introduced to several regions worldwide for its ornamental properties. The plant goes by several local names, such as California thistle, corn thistle, field thistle, and Canadian thistle.

Creeping thistle is a tall, herbaceous weed plant that can grow up to 150 cm high. The plant starts growing in a basal rosette formation before transforming into upright, branching stems.

The creeping thistle produces dark green, oblong-shaped leaves that grow in an alternate formation on the stem. They have irregularly shaped edges, which are spiny.

The upper part of the leaves is smooth, while the underside is hairy. Another feature of the plant is the small, pink to purple flowers, which form at the top of the stems.

Creeping thistle is an aggressive weed plant that can invade pastures, fields, and gardens. It spreads quickly through seeds and its creeping tap root system.

On top of that, it is pretty tough and can withstand harsh climatic conditions, not to mention that it is resistant to most herbicides.

11. Wild sunflower (Helianthus annuus)

Sunflowers are not considered to be a weed by most people. They are grown commercially for oil, have aesthetic flowers, and even extract toxins from the soil.

However, despite these benefits, wild sunflowers can be pretty aggressive. They have a rapid root expansion and thus can spread very fast.

They are also very competitive and can be resistant to herbicides. Therefore, they can be a nightmare, especially if they start growing in crop fields and gardens.

The wild sunflower is a bushy plant that grows up to three meters tall with stout, hollow stems. It has greyish-green leaves, which grow in an alternate formation from the stem.

They are ovate to orbicular in shape, large (up to 10 cm long), and have toothed margins and fine hairs.

You can also identify the plant with its large, conspicuous yellow flowers with a sun-like shape – hence the name.

12. Giant hogweed (Heracleum mantegazzianum)

Giant hogweed is a perennial flowering plant native to Eurasia but was introduced to several parts of the world as an ornamental plant.

It is considered to be a noxious weed in most places – it spreads very fast, overcrowding other plants, and produces a toxic sap that is toxic to human beings.

Giant hogweed is one of the big weeds – hence the name – with the potential to reach up to 5.5 meters high. You can identify it by its thick, green stalks with purple blotches and coarse hairs at the base from where leaves emerge.

It also has large, deeply incised, and loved leaves that grow in an alternating pattern.

However, its most unique feature is the large white flowers, which form an umbrella-like design at the top of the plant.

13. Thickhead (Crassocephalum crepidioides)

Thickhead is a herbaceous weed plant that is native to sub-Saharan Africa but widespread worldwide.

It goes by several local names, such as fireweed, redflower ragleaf, and hawksbeard velvet plant. It primarily grows in crop fields, forestry plantations, gardens, parks, roadsides, waster areas, etc.

The thickhead weed plant has tall-growing, erect stems that grow up to 1.5 meters high. They can be hairless or have small amounts of hair.

Leaves shoot out from the stem in an alternate formation, and they can grow pretty huge (up to 20 cm long and 10 cm wide). These leaves are ovate-shaped, have a toothed margin and a pointed apex, and are usually lobed.

The final identifying feature of the thickhead weed is the flowers. The plant produces clustered flower heads, which grow at the top. They range in color from orange to reddish, purple, or pinkish.

14. Common mullein (Verbascum thapsus)

Common mullein, also known as the great mullein, is a biennial plant native to Africa, Asia, and Europe. It commonly grows on roadsides, hedgerows, railroads, pastures, gardens, meadows, and more.

Common mullein is not considered highly aggressive; it is not as competitive against other plants. It is also easy to eradicate using mechanical (hands) or chemical (herbicides) solutions.

That being said, it produces several thousand seeds and has a deep taproot system. As a result, it has the potential to spread very fast, becoming quite a nuisance.

As one of the most common weeds with thick stalks, the common mullein grows in a single upright stem that reaches up to two meters. It has large, oblong-shaped leaves that reach up to 50 cm long.

They grow in rosette formation during the first year, and after that, they grow in an alternate shape.

The plant’s leaves are greyish-green in color, with a smooth upper side and a hairy underside. Besides that, you can identify common mullein by its small, yellow flowers that group densely in a spiral formation up the stem.

15. Himalayan balsam (Impatiens glandulifera)

Himalayan balsam is a large annual flowering plant native to the Himalayan region. However, it spread to several areas after being introduced as an ornamental plant.

Himalayan balsam is considered to be an invasive plant in several areas. It is aggressive, proliferating quickly through seed dispersal (one plant can produce up to 800 seeds). It is also very competitive and tends to crowd out and out other vegetation.

Himalayan balsam is a tall-growing weed plant that reaches up to 3 meters high. It has large, broadleaf leaves (up to 23 cm long), lanceolate-shaped.

They are bright green and shoot out from the red-tinged stem. The plant also produces a cluster of pink to purplish flowers, which bloom between June and October.

Summary

The above are some tall weeds with thick stalks that you can find in your garden. Hopefully, they can help you identify the plants you are dealing with and whether they are invasive or not.

However, several more weeds fit the criteria. If the plant you are dealing with is not in the list above, there are a few other ways of identifying it.

For example, you can look up its features (stem, leaves, and flowers) on the internet. You can also take a picture and use a plant identification app to find its name.

Carter

IW’s Chief Editor and a lover of green spaces.

The post 15 tall weeds with thick stalks you may find in your garden appeared first on InsightWeeds.

Some of them – particularly weeds with huge leaves – look like actual plants or flowers. Other leafy weeds are even edible, yet they might give the false impression of a non-invasive plant.

Whatever the case might be, having big leaf weeds growing in your garden is not ideal. They are likely to be aggressive and can harm your plants. Some can even be poisonous and thus a huge hazard if you have kids or pets.

These are some of the most common weeds with large leaves you are likely to find growing in your garden:

1. Common Burdock (Arctium minus)

Common burdock, also known as lesser burdock, is a biennial weed plant that primarily grows on lawns and gardens.

It can also be found on landscaped gardens, paddocks, pastures, and along the road and streams.

Burdock can be identified by its large, heart-shaped leaves that resemble elephant ears. The leaves have a basal rosette formation during their first year and have a hairy texture on the underside.

Another distinguishing feature is purple to lavender flowers, which form at the leaf axis or the end of branches.

Common Burdock is an edible plant – usually the roots, leaves, and stalk. However, the plant is highly invasive, with a large root system that guarantees survival.

It also spreads easily and quickly through the seeds. More than that, it is vulnerable to diseases such as powdery mildew and root rot and spread them to your plants.

Therefore, removing it as soon as you spot it is better.

2. Broadleaf plantain (Plantago major)

Broadleaf plantain, also known as greater plantain or white man’s foot is a perennial flowering plant native to Europe and Asia.

However, it is widely naturalized, and you can find it anywhere in the world. It usually grows on gardens, lawns, meadows, roadsides, and even sidewalks (from the cracks).

Broadleaf plantain is characterized by huge oval-shaped leaves that grow between 5 and 20 cm long.

They have a smooth surface and margin and grow in a rosette formation close to the ground. The plant produces small, greenish-brown flowers at the top of the stem.

Broadleaf plantain is a beneficial weed plant, with the leaves being edible. However, it spreads easily through seeds, with a single plant producing up to 20,000 seeds. It is one of the most common weeds with huge leaves.

3. Pokeweed (Phytolacca Americana)

Pokeweed, also known as American pokeweed is an herbaceous perennial plant native to the North American region. It sometimes grows in yards and gardens, but you are more likely to find it in forest edges, fence rows, and pastures.

American pokeweed is another one of the weeds with very huge leaves, which can grow up to 35 centimeters long.

They grow in an alternating pattern, and are medium green in color, with the underside having a lighter shade. It has white to greenish flowers (can also be pink), and green berries that turn dark purple when they ripen.

American pokeweed is an edible and beneficial plant. Young leaves and stems can be cooked and eaten. Juice that is extracted from berries can be used as a dye.

However, the plant is highly poisonous, especially the roots and berries. As it matures, the leaves and stems also become deadly.

4. Hedge bindweed (Calystegia sepium)

Hedge bindweed, also known as Rutland beauty or bugle vine, is an herbaceous perennial plant that is found in temperate areas. It is one of the lawn weeds with big leaves that you are likely to find growing on your property.

Hedge bindweed leaves are matte green in color and can grow up to 10 centimeters long and 7 centimeters broad. It produces beautiful, white or pale pink flowers with dark stripes, which bloom in summer or late spring.

Hedge bindweed is one of the most aggressive weeds with huge leaves. It spreads quickly through its rhizome root systems. It is also self-seeding and can produce seeds that remain active for up to 30 years.

Lastly, the plant creeps and binds – hence the name – itself against other plants. Unchecked, it can weaken and even pull down shrubs and small trees.

5. Velvetleaf (Abutilon theophrasti)

Velvetleaf is an annual weed plant native to Asia but widespread in several regions of the world. It is a common sight in gardens, cornfields, landscape sites, and along roadsides and rail tracks.

Velvetleaf is a tall plant – growing up to 8 feet high. It is one of the tallest weeds with huge leaves.

Its flowers are yellow in color. The leaves are covered in short hairs, which produces a soft, velvety texture – hence the name.

The plant has many beneficial uses – it is edible, has medicinal uses, and is even used to make ropes and nets.

However, it is an aggressive and highly competitive weed, which steals nutrients from other plants.

6. Pigweed (Amaranthus spp.)

Pigweed is the name given to several species of perennial or annual plants, which are also known as amaranths. The plants are thought to be native to Asia and the Americas regions, but they are currently spread to every continent.

The pigweed plants have large leaves – up to 15 centimeters long – which grow in opposite or alternating formations.

They are oval-shaped and have a dark or light green color (though some plants have leaves with purple hues). The flowers, on the other hand, range from greenish to crimson.

Pigweed is edible, with the leaves being used as vegetables and seeds ground into porridge flour. In fact, some people don’t consider it to be a weed.

The plant is even cultivated commercially in some areas. However, it spreads easily through seeds, making it pretty invasive.

7. Poison Ivy (Toxicodendron radicans)

Poison ivy, also known as eastern poison ivy, is a flowering plant that is native to Asia and eastern regions of North America. It is poisonous and causes painful itches and rash on the skin on contact.

Poison ivy has almond-shaped trifoliate leaves, which grow up to 12 centimeters long. In rare cases, the weed can have massive leaves that are up to 30 centimeters long.

The leaves are usually light or dark green in color but turn to bright orange, red, or yellow in the fall season. This is also one of the most common weeds with huge leaves.

8. Bitter dock (Rumex obtusifolius)

Bitter dock (broad-leaved dock) is a perennial weed that is common in pastures and gardens. It is native to Europe but has spread widely to all continents. It is a highly invasive plant that spreads quickly through seeds and an aggressive root system.

The bitter dock plant has large oval-shaped leaves that grow up to 30 cm long and 15 cm wide. They have a rounded tip, cordate base, and are slightly wavy at the edges.

The leaves are also smooth on the top and hairy on the underside. The plant produces small, greenish flowers that turn reddish-brown as they mature.

9. Common figwort (Scrophularia nodosa)

Common figwort, also known as woodland figwort, is a weed plant that grows in shady areas such as gardens, wastelands, cultivated fields. It is primarily found in the temperate regions of Northern America.

Common figwort grows tall and can reach up to 150 cm high. It has large leaves with toothed margins, ovate bases, and lanceolate tips, which grow opposite each other.

The plant produces globular flowers that are greenish-purple with hues of white.

10. Princess tree (Paulownia tomentosa)

Princess tree, also known as paulownia or empress tree, is another weed you can find in your garden, woods, or fencerows. It has a tall, thick stalk and produces very attractive flowers.

But make no mistake! It is an invasive species that produces several million seeds that germinate anywhere with small amounts of soil.

The Princess tree is one of the tall weeds with large leaves, which reach up to 12 inches long and 9 inches wide. They are heart-shaped and hairy on both sides.

Another distinctive feature is its flowers, which are tubular and pale purple in color.

11. Honesty (Lunaria annua)

Honesty is a flowering plant that is native to Asia and the Balkans but naturalized throughout the world in temperate regions.

It is known by several local names such as silver dollars, money plant, Pope’s money, coins of Judas, or Chinese money. This is in reference to its disc-shaped silicles (fruits/seedpods), which look a lot like silver coins.

Honesty weed has large, pointed, oval-shaped leaves. They are coarse, have serrations, and are hairy.

In summer and spring, the plant blooms attractive white or violet flowers, and conspicuous silicles that are brown, green, or translucent (silvery).

12. Redshank (Persicaria maculosa)

Redshank is an annual plant that grows close to human activity. You can find it in gardens, yards, roadsides, along creeks, and even from cracks in the sidewalks.

The plant has several medicinal benefits and its young leaves are edible. However, it is invasive – spreading fast once introduced in an area – and competes for nutrients with other plants.

You can identify the redshank weed by its narrow but long and massive ovate-shaped leaves. They have distinctive brown or black spots in the center and have an entire margin.

The plant also produces small, seed-like, pink flowers, which grow at the end of the stem in a dense spike.

13. Hedge Woundwort (Starchycs sylvatica)

Hedge woundwort is a weed plant that is a common site on gardens, meadows, in the woods, along hedgerows, and on roadsides.

It is highly invasive, spreading through seeds that scatter far and with ease. It also has a vast rhizome root system, which spreads vigorously once it takes hold.

You can identify hedge woundwort by its stem, leaves, and flowers. The stems are hairy, the same as the leaves.

Its leaves are also large (up to 15 cm long and 5 cm wide), dark green, heart-shaped, and have a toothed margin. On the other hand, its flowers have a conspicuous magenta-pink color, with white markings.

14. Garlic mustard (Aliaria petiolata)

Garlic mustard is a biennial flower plant that comes from the mustard family. You can find it growing on hedgerows, edge of the woods, gardens, and landscape sites.

It is an invasive weed species that produces several seeds that sprout and overwhelm other plants. The plant also produces toxic compounds, that leech into the soil and kill beneficial fungi.

Garlic mustard has heart-shaped leaves with a toothed margin. They have a garlic and mustard flavor hence the name. The leaves are added to food as a spice or eaten in salads in some areas. They are also said to exhibit medicinal properties.

Aside from the leaves, you can identify the plant by its white flowers with four petals. The flowers bloom around spring and summer and are edible.

15. Stinging Nettle (Urtica dioca)

Stinging nettle, also known as common nettle, is an herbaceous perennial plant native to Europe, Asia, and North Africa. Over time, it has naturalized and become endemic to all continents.

It has several benefits, from being used as food, medicine, and even raw materials for the textile industry.

However, it is an invasive species that is hard to eradicate. More than that, it is irritating, especially the stinging nettle hairs and the pollen that causes hay fever.

Stinging nettle has dark green leaves that grow opposite each other on the stem. They are pretty large, reaching up to 15 cm (length) and 5 cm (width).

The leaves are serrated and have tapered ends. The plant also produces tiny, greenish-white flowers in the summer, that grow in clusters from the stems.

16. Japanese Knotweed (Reynoutria japonica)

Japanese knotweed is a perennial plant that comes from the buckwheat and knotweed family. It is native to Asia, particularly Japan, but is a common sight in Europe and North America.

The weed commonly grows on hedgerows, riverbanks, waste grounds, and roadsides. But you can also find it in your garden.

Japanese knotweed has appealing red-brown stems, which turn green at the tip. It also sports bright green, heart-shaped leaves that grow alternately on the stem.

The leaves are large and broad (up to 15 cm long and 12 cm wide), have smooth surfaces, and an entire margin. As for the flowers, the plant produces small, greenish-white flowers, which are clustered along the stem.

Its root structure enables it to grow faster. Here’s a detailed guide for eliminating Japanese knotweed.

17. Russian Comfrey (Symphytum x uplandicum)

Russian comfrey is a perennial plant, which is a hybrid of the rough and common comfrey plants. It primarily grows on roadsides, woodlands, and waste grounds. However, it can invade gardens and other cultivated lands.

Russian comfrey has large, lance-shaped leaves, which can grow up to 14 inches long. They are medium green in color and have a wavy margin.

Its flowers, on the other hand, are purplish-blue in color and appear around summer.

Russian comfrey has many benefits, from medicinal uses, and ironically, weed control. It is planted as a cover plant in some areas, to smother weeds and provide organic matter after cultivation.

However, this is one of the highly invasive weeds with huge leaves that have aggressive rhizome root systems that allow it to spread fast.

18. Green Alkanet (Pentaglottis sempervirens)

Green alkanet is a perennial plant native to the European region, but also common in most parts of the world.

It is a tall-growing plant, that is a common sight in shaded areas, and is often found close to buildings.

Green alkanet has large, green, hairy leaves that grow in a basal rosette formation in the lower part of the stem. On the other hand, those on the upper part are attached to the stem and grow in an alternating pattern.

The plant also produces beautiful blue flowers, which grow on the upper axis of the leaves.

19. Giant Hogweed (Heracleum mantegazzianum)

Giant hogweed, also known as giant cow parsley or wild parsnip, is an herbaceous perennial plant.

It is native to the Eurasia region but has spread all over the world. The weed was primarily introduced to new areas as an ornamental plant.

Giant hogweed has giant compound leaves with three leaflets that are deeply lobbed. The lower leaves are massive, growing up to 1.5 meters across the stem.

The plant also produces small, white flowers, which develop into seed pods, with each producing over 1,000 seeds.

Giant hogweed spreads easily through its seeds. It also has a giant tap root system that makes it a nuisance to eradicate. It is also pretty poisonous, with the stem producing sap that causes skin irritation, lesions, and blisters.

20. Dame’s violet (Hesperis matronalis)

Dame’s violet is a flowering plant known by several local names, such as dame’s rocket, dame’s gillyflower, and summer lilac, among others.

It is native to Eurasia but has spread worldwide – cultivated mostly for its ornamental benefits.

Dame’s violet plant is growing tall–reaching heights up to 1 meter high. It produces several upright stems, which are hairy.

Its leaves are bright green, lanceolate-shaped, and have a toothed edge. They grow alternately on the stem and have short hairs on both the upper and lower parts.

Dame’s violet also produces conspicuous flowers ranging from white to lavender or purple. It blooms in late spring and early summer.

Conclusion

Looking to identify weed plants in your garden? The above are some of the invasive weeds with huge leaves.

Most of them are easily identified as weeds due to their aggressive nature. However, some can pass for flowers or beneficial plants, and others are even edible and cultivated for food.

Nonetheless, these plants are invasive weeds. If left uncontrolled, they can overwhelm your garden, making it hard to grow other plants.

Now that you know how to identify them, you can move on to the next step – finding the perfect eradication solution.

Related Guides

• List of the best free plant identification apps
• What is the best free tree identification app?
• Types of leaves and their botanical names
• Fastest-growing large-leaf plants

Carter

IW’s Chief Editor and a lover of green spaces.

The post 20 weeds with huge leaves you may find in your garden appeared first on InsightWeeds.

Its infestation causes tremendous destruction on a property by bringing down the value and making the owners liable for criminal persecution.

Killing this superweed is a real nightmare because its roots can grow to a depth of 6 feet below the ground. The weed can always reshoot from any tiny root left behind, and you cannot permanently get rid of Japanese knotweed using topical methods such as herbicides.

Several organic methods have been effective in eliminating Japanese knotweed. Some are less effective, while others have always backfired owing to the notorious root system of the plant.

3 organic products that can get rid of Japanese knotweed

If you are not sure which organic products to use, here is a guide on the commonly used ones and their effectiveness:

1. Lime

Severally, lime or calcium carbonate has been used as a remedy for all types of weeds. The argument is that lime is incredibly alkaline, and adding it to the soil burns the weeds and stops them from growing.

Killing Japanese knotweed with lime damages the above-ground stems of the weed. The roots often remain intact, and an alternative remedy should be sought to prevent them from generating new shoots.

2. Salt

You may have heard that salt can be used as an organic herbicide, and there is some truth to this. Adding large amounts of salt to unwanted plants can dehydrate them, causing them to wither. However, certain weeds are impossible to eradicate using this organic method. For instance, killing Japanese knotweed with salt may never work because of the notorious nature of the plant.

Even if you uproot the knotweed and add salt to the soil, any small fragment of the weed’s rhizome that remains underground can survive for a long time and grow into a new plant as soon as the conditions become favorable. If you want to try out this method, use either rock salt or Epsom salt.

3. Vinegar

Many people have tried killing Japanese knotweed with vinegar. However, there is no concrete scientific evidence suggesting it as an effective remedy. Vinegar is highly acidic, thus capable of killing the shoots and stalk of the weed.

Besides destroying the shoot and stem, vinegar can also kill the roots if it is absorbed by the soil due to its low PH.

Using vinegar to kill the weed is better than household bleach which has also been in use for some time as a natural herbicide. Although it is a remedy that has been tried by several people, it does not yield the right results thereafter. It seems to cause more harm than good.

What is the best approach to get rid of Japanese knotweed?

Applying different methods when eradicating the superweed minimizes the chances of regrowth. Due to the destructive nature of Japanese knotweed, people are always looking for innovative ways of removing it.

The desire to use organic products is quite understandable because they are readily available. That said, you also need to understand that these are only alternative treatments and may not be as effective as the use of chemical treatment.

Constant mowing can help you eventually get rid of knotweed in the grass. However, using the best organic methods can help speed up the elimination process.

How long does it take to kill Japanese knotweed?

Again, this depends on the methods used and how effective they are. It can take between three seasons and five years to eliminate the weed. This is by using a combination of organic and chemical methods. The eradication can be immediate if excavation is employed.

Organic solutions are the most cost-effective, and using them over a sustained period can exhaust the plant. The only downside is that they do not remove the roots from the soil, yet leaving as small as 0.7g of the root system means that the knotweed will sprout back again.

Japanese knotweed can survive harsh soil conditions and tends to thrive in both acidic and alkaline soils. Using organic products such as lime and vinegar means that you must be open to the possibility of burning the shoots and stem of the weed but not killing the root system.

From the Japanese knotweed success stories, there is enough evidence to suggest that organic methods only work to a considerable extent.

Related Guides

• Organic methods to destroy weeds

Carter

IW’s Chief Editor and a lover of green spaces.

The post How to get rid of Japanese knotweed organically appeared first on InsightWeeds.