Mealybugs & Scale on Hydrangeas
Whole plant problem · common pattern reported by gardeners · verify locally
What you'll see
- White cottony masses
- Sticky honeydew
- Sooty mold
Most common causes
- Mealybugs feeding in leaf axils and stem joints
- Ants farming them for honeydew
- Warm, sheltered, low-airflow spot
How to fix it
- Wipe with alcohol swab
- Insecticidal soap
- Neem oil
Prevention: Inspect new plants Encourage predators Good air flow
More Hydrangea problems
ZoneFig content reflects widely published extension-service and gardening guidance. Symptoms and causes are common patterns, not a diagnosis for any individual plant — verify locally and treat conservatively.