Check these first
- Rub the white spots to see if they wipe off like dust.
- Check if the plant is in a spot with stagnant air.
- Ensure you are watering the soil and not the leaves.
Likely causes
Powdery Mildew
Most likelyHow to tell: The leaves will look like they have been dusted with flour. It usually starts on the older leaves and spreads quickly.
What to do: Remove the most heavily affected leaves to improve airflow. Spray the plant with a mixture of one tablespoon of baking soda in a gallon of water.
Water Splashing
PossibleHow to tell: Small brown or white spots appear after watering if you splash soil onto the leaves. This is usually just cosmetic damage.
What to do: Water at the base of the plant rather than over the top of the foliage. Wipe any soil off the leaves with a soft, damp cloth.
Find out what's wrong with your common fumitory
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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
When to worry
If the spots cover most of the foliage and the leaves start to turn yellow or drop, the plant is struggling significantly.
Stopping it coming back
Ensure your plant has plenty of space for air to move around it and avoid getting the leaves wet when watering.
Common Fumitory: spots? Check yours with a photo
Every plant is a little different. Take a photo of your common fumitory 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Is powdery mildew fatal?
- It is rarely fatal if caught early, but it can weaken the plant and make it look unsightly. Treat it as soon as you notice the first spots.
- Should I throw the plant away?
- No, you do not need to discard the plant. With proper treatment and better airflow, it will recover.
Guides to these causes
More problems with Common Fumitory
- Why are there bugs on my Common Fumitory?
- Why is my Common Fumitory looking so leggy?
- Why is my Common Fumitory drooping?
- Why are my Common Fumitory leaves turning yellow?
- Why is my Common Fumitory not flowering?
- Why is my common fumitory suffering from root rot?
- Why are my common fumitory leaves curling?
Back to the Common Fumitory guide
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.

