Troubleshooting
Virginia Stock problems — and how to fix them
Virginia Stock (Malcolmia maritima) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Powdery mildew
White powdery coating appears on leaves in dry weather with poor air circulation, especially as the season advances; improve spacing and avoid overhead watering in the evening.
Flea beetle damage
Tiny round holes in cotyledons and young leaves are caused by flea beetles (Phyllotreta spp.), which are common on Brassicaceae; protect seedlings with fine insect mesh or use diatomaceous earth around the base of plants.
Prevent virginia stock problems before they start
Most virginia stock issues are care-mismatch, not bad luck. Dial in the basics:
Virginia Stock problems — FAQ
Why is my virginia stock powdery mildew?
White powdery coating appears on leaves in dry weather with poor air circulation, especially as the season advances; improve spacing and avoid overhead watering in the evening.
Why is my virginia stock flea beetle damage?
Tiny round holes in cotyledons and young leaves are caused by flea beetles (Phyllotreta spp.), which are common on Brassicaceae; protect seedlings with fine insect mesh or use diatomaceous earth around the base of plants.