Pocket Botanist
Check these first
- Check if the white dust rubs off easily with your finger.
- Ensure the plant is not crowded by other foliage.
- Verify that you are watering the soil directly rather than the leaves.
Likely causes
Powdery mildew
Most likelyHow to tell: A white, flour like coating appears on the surface of the leaves. It eventually causes leaves to turn yellow and drop off.
What to do: Improve airflow by spacing plants further apart. Remove heavily infected leaves and treat the rest with a mixture of one tablespoon of baking soda in a gallon of water.
Leaf spot disease
PossibleHow to tell: Small brown or black spots with yellow halos appear on the leaves. These spots often grow larger and cause the leaf to wither.
What to do: Avoid overhead watering to keep the foliage dry. Prune away affected leaves and discard them in the trash, not your compost pile.
Find out what's wrong with your sweet violet
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.
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When to worry
Act immediately when you see the first signs of white dust. If left untreated, it can quickly spread to the entire plant and weaken it significantly.
Stopping it coming back
Water only at the base of the plant and ensure your violets have plenty of space for air to move between them.
Sweet violet: spots? Check yours with a photo
Every plant is a little different. Take a photo of your sweet violet 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 contagious to other plants?
- Yes, it spreads easily through air currents. Keep infected plants away from your healthy ones until they are fully recovered.
- Should I cut off all the spotted leaves?
- Remove only the leaves that are heavily damaged. If you remove too many at once, the plant may struggle to produce energy.
Guides to these causes
More problems with Sweet violet
- Why are there holes in my sweet violet leaves?
- Why is my sweet violet not flowering?
- Why is my sweet violet looking leggy?
- Why is my sweet violet drooping?
- Why are my sweet violet's leaves turning yellow?
- Why are my sweet violet leaves getting brown tips?
- Why is my sweet violet wilting and showing root rot?
- Why are my sweet violet leaves curling?
Back to the Sweet violet 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.