Herbicide damage
Abiotic
5 host plants
Last updated
Hydrangea foliage shows burn, yellowing, or distortion after nearby herbicide application, even without direct contact. Drift from broadleaf killers injures ornamentals at distance. Use separate spray equipment, avoid application when drift is likely, and apply herbicides away from desirable plants. Maintain plant health to aid recovery.
Remove affected material as you find it and clean up any fallen debris where herbicide damage spores can overwinter. Improve air circulation around susceptible plants through selective pruning. Avoid overhead irrigation during vulnerable growth periods. If the problem is persistent, your local Extension office can recommend current fungicide or bactericide options for your specific situation.
Quick Reference
Management
Cultural Controls
- Use care when applying herbicides near desirable plants.
- When practical, use separate spray equipment for herbicides and fungicides/insecticides to avoid accidental damage.
- Herbicides may cause damage when they contact thin or green bark, even if they are not applied directly to a plant or its leaves.
- Do not apply herbicides when drift onto nearby desirable plants is likely.
- Use caution when using soil-applied products to keep contaminated water away from root zones of susceptible ornamentals.
- Use special care when applying herbicides to turf areas near ornamental plantings.