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Powdery Mildew in Rosemary

How to identify and treat powdery mildew in Rosemary.

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Rosemary care requirements

water
Low. Allow to dry between waterings.
soil
Sandy, well-draining, slightly alkaline soil.
light
Full sun — 6+ hours daily.
symptoms

Symptoms to look for in Rosemary

White, powdery coating on leaves and stems, though relatively uncommon on this drought-loving herb compared to softer-leaved plants.

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Common causes in Rosemary

Powdery mildew on Rosemary usually signals poor airflow or a spot that's more humid or shaded than this Mediterranean herb prefers, since its needle-like leaves and love of dry conditions normally discourage the disease.

healing

How to treat powdery mildew in Rosemary

Improve airflow by thinning dense growth or moving the plant to a sunnier, breezier spot, and remove heavily affected growth.

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Preventing powdery mildew in Rosemary

Provide full sun and good ventilation, avoiding shaded or humid spots where Rosemary is already outside its comfort zone.