Troubleshooting
Common blue violet problems — and how to fix them
Common blue violet (Viola sororia) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Aggressive self-seeding
Cleistogamous seed pods (formed without opening) produce abundant seed, which can lead to colonisation of lawns and garden beds. Deadhead spring flowers promptly to reduce seed set, or embrace the plant's spreading habit in naturalistic gardens.
Powdery mildew
White coating on leaves in late summer, particularly in dry or crowded conditions. Thin colonies to improve air circulation and water at the base. The plant rarely suffers lasting damage and new growth is typically clean.
Slug damage in spring
Young leaves and flowers are vulnerable to slug and snail damage as they emerge in early spring. Apply iron phosphate pellets around plants before new growth appears, or use nematode treatments (Phasmarhabditis hermaphrodita) when soil temperature exceeds 5°C.
Prevent common blue violet problems before they start
Most common blue violet issues are care-mismatch, not bad luck. Dial in the basics:
Looking for common blue violet in general rather than its problems? Read the full common blue violet care guide — light, water, soil and feeding.
Common blue violet problems — FAQ
Why is my common blue violet aggressive self-seeding?
Cleistogamous seed pods (formed without opening) produce abundant seed, which can lead to colonisation of lawns and garden beds. Deadhead spring flowers promptly to reduce seed set, or embrace the plant's spreading habit in naturalistic gardens.
Why is my common blue violet powdery mildew?
White coating on leaves in late summer, particularly in dry or crowded conditions. Thin colonies to improve air circulation and water at the base. The plant rarely suffers lasting damage and new growth is typically clean.
Why is my common blue violet slug damage in spring?
Young leaves and flowers are vulnerable to slug and snail damage as they emerge in early spring. Apply iron phosphate pellets around plants before new growth appears, or use nematode treatments (Phasmarhabditis hermaphrodita) when soil temperature exceeds 5°C.