Will the white spots go away on their own?

No, powdery mildew will continue to spread until you treat it. It is best to act as soon as you notice the first patch.

Should I cut off the spotted leaves?

Yes, removing heavily infected leaves helps stop the spread to healthy parts of the plant. Dispose of them in the trash, not your compost pile.

Common agrimony: spots, causes and fixes

Check these first

Inspect the leaves for a powdery texture.
Check if the plant is crowded by other pots.
Look for signs of moisture sitting on the foliage.

Likely causes

Powdery mildew
Most likely
How to tell: You will see a white, dusty coating on the leaves that looks like flour. It often starts on older leaves and spreads quickly if left untreated.
What to do: Mix one tablespoon of baking soda with a gallon of water and a drop of dish soap. Spray the solution onto the affected leaves once a week. Ensure you improve airflow around the plant by spacing it away from others.
Water splashing
Possible
How to tell: Small, discolored spots appear after watering if you splash soil or water onto the foliage. These spots are usually brown or yellow rather than white and fuzzy.
What to do: Water at the base of the plant instead of over the top. Keep the leaves dry to prevent fungal growth.

Leaf spots on other plants

Find out what's wrong with your common agrimony

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 more than half the leaf surface, the plant will struggle to photosynthesize. Small, isolated spots are easy to manage with quick treatment.

Stopping it coming back

Keep your agrimony in a spot with good natural airflow and avoid overhead watering.

Common agrimony: spots? Check yours with a photo

Every plant is a little different. Take a photo of your common agrimony 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

Will the white spots go away on their own?: No, powdery mildew will continue to spread until you treat it. It is best to act as soon as you notice the first patch.
Should I cut off the spotted leaves?: Yes, removing heavily infected leaves helps stop the spread to healthy parts of the plant. Dispose of them in the trash, not your compost pile.

Guides to these causes

Powdery Mildew

Why are there white spots on my Common agrimony?