Is powdery mildew contagious?

Yes, the spores can easily spread to nearby plants through the air. Isolate the affected plant until it is clear.

Should I cut off the spotted leaves?

If the spots are widespread, removing the worst leaves can help reduce the spore count.

Why are there white spots on my Wood sage? Causes and fixes

Check these first

Look closely at the white spots to see if they rub off like dust.
Check if the plant is crowded by other plants.
Ensure the leaves are not staying wet after watering.

Likely causes

Powdery mildew
Most likely
How to tell: A white, dusty coating appears on the surface of the leaves, often starting on the older growth.
What to do: Improve airflow by spacing out your plants or moving them to a breezier spot. You can wipe the leaves with a mixture of one part milk to nine parts water to help clear the fungus.
Water splashes
Possible
How to tell: Small, irregular spots appear after watering, often looking like mineral deposits.
What to do: Water at the base of the plant rather than overhead. This keeps the foliage dry and prevents fungal growth.

Leaf spots on other plants

Find out what's wrong with your wood sage

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

When to worry

If the white spots cover most of the leaves and the plant starts dropping them, it is a serious infection. Small, isolated spots are easy to manage.

Stopping it coming back

Provide good air circulation and avoid wetting the leaves when you water.

Wood sage: spots? Check yours with a photo

Every plant is a little different. Take a photo of your wood sage and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

Get the app · Or check it from a photo now, free

Questions people ask

Is powdery mildew contagious?: Yes, the spores can easily spread to nearby plants through the air. Isolate the affected plant until it is clear.
Should I cut off the spotted leaves?: If the spots are widespread, removing the worst leaves can help reduce the spore count.

Guides to these causes

Powdery Mildew

Why are there white spots on my Wood sage?

Check these first

Not sure what's wrong with your wood sage?