Hydrangeas are a beloved staple in many gardens, and it’s easy to see why. Their variety of showy and vibrant blooms can add beauty to any landscape.
However, like all garden plants, they can be compromised by the presence of weeds, which compete for important nutrients, water, and light. To keep the magnificent blossoms healthy, it is crucial to apply effective weed control practices.
Here are the best practices for managing weeds around hydrangeas to keep your garden thriving.
1. Mulching
Mulching is one of the most effective ways to manage weeds around hydrangeas. Apply a 2-3 inch layer of organic mulch, such as wood chips, bark, or shredded leaves, around your flowers. The mulch blocks the sunlight, limiting weed seed germination.
Mulch also helps to retain soil moisture and maintain soil temperature, creating an ideal environment for hydrangeas while being hostile to weeds.
2. Regular Weeding
Regular weeding, either by hand or a hoe, is an easy approach to eradicating weeds growing around your hydrangeas.
The best time to weed is after the rains when the soil is moist, and weeds are easier to pull out with their roots intact.
3. Adequate Plant Spacing
Strategic spacing when planting hydrangeas can also effectively manage weeds. Plant the flowers with enough space between them to allow for air circulation and growth but close enough to shade the soil once they mature.
Gardening experts recommend 3-6 feet for most hydrangea varieties. When done right, the natural shading can help prevent weeds from sprouting by blocking sunlight. Overcrowding, however, can stress plants and make them more susceptible to diseases and weed invasion.
4. Herbicides
If manual weeding is too labor-intensive or if weed issues persist, consider using herbicides that are safe for hydrangeas.
Apply a selective pre-emergent herbicide like isoxaben in early spring to prevent weed growth.
Post-emergent herbicides like fluazifop or sethoxydim can also help manage weeds around ornamentals like hydrangeas.
5. Organic Weed Control
Organic herbicides can be a preferable choice for those looking to manage weeds in a more environmentally friendly way.
Apart from hand-pulling and mulching, other natural methods you can use to manage weeds around hydrangeas:
- Vinegar — A solution of vinegar is effective in killing young weed plants. Spray the vinegar directly on the weeds and ensure it does not come into contact with flowers, as it could kill them.
- Cornmeal gluten — Applying cornmeal gluten is an effective weed management strategy for already established gardens. Apply it in spring to prevent weeds from growing.
6. Maintaining Healthy Hydrangeas
Maintaining healthy hydrangeas is a proactive measure that can help to prevent weed growth. Regular watering and fertilization encourage strong, healthy plants that can outcompete weeds.
Gardening buffs recommend watering the flowers twice a week. Aim the water directly at the soil rather than at the flowers or leaves to discourage weed growth on the exposed parts of the plants.
Lead Editor for Insight Weeds.