Check these first
- Inspect the undersides of the leaves for tiny insects.
- Look for sticky residue or slime trails on the foliage.
- Check the soil surface for hiding slugs.
Likely causes
Aphids
Most likelyHow to tell: You will see clusters of tiny green or black insects on the tender new growth. They often leave behind a sticky residue called honeydew.
What to do: Spray the plant with a strong stream of water to knock them off. If they persist, apply insecticidal soap once a week until they are gone.
Slugs
PossibleHow to tell: You will notice irregular holes chewed into the leaves and shiny slime trails left behind. They usually feed at night and hide during the day.
What to do: Handpick them off in the early morning or evening. You can also place a shallow dish of beer near the base to trap them.
Find out what's wrong with your horned 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
When to worry
Small numbers are manageable, but if the plant stops growing or leaves start curling, you need to act fast. A few aphids are normal, but a full infestation can weaken the plant.
Stopping it coming back
Keep the area around your plants clear of debris where slugs like to hide. Check your plants weekly to catch small groups of insects before they multiply.
Horned Violet: pests? Check yours with a photo
Every plant is a little different. Take a photo of your horned 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
- Can I use dish soap to kill aphids?
- Yes, but use a mild, non-detergent soap mixed with water. Avoid heavy degreasers as they can damage the delicate leaves.
- Will these pests kill my plant?
- A severe infestation can stunt growth or spread disease. Most healthy plants recover quickly once the pests are removed.
Guides to these causes
More problems with Horned Violet
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- How do I fix root rot in my Viola cornuta?
- Why are my Viola cornuta leaves curling?
Back to the Horned 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.

