Troubleshooting
Great Masterwort problems — and how to fix them
Great Masterwort (Astrantia major) 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
A white powdery coating on leaves is common in dry conditions or where air circulation is poor; keep plants well watered, thin surrounding plants, and remove affected foliage.
Astrantia leaf miner
Larvae of the leaf-mining fly cause brownish patches and pale tunnels in leaves, typically appearing in early summer; remove and dispose of affected leaves promptly.
Prevent great masterwort problems before they start
Most great masterwort issues are care-mismatch, not bad luck. Dial in the basics:
Great Masterwort problems — FAQ
Why is my great masterwort powdery mildew?
A white powdery coating on leaves is common in dry conditions or where air circulation is poor; keep plants well watered, thin surrounding plants, and remove affected foliage.
Why is my great masterwort astrantia leaf miner?
Larvae of the leaf-mining fly cause brownish patches and pale tunnels in leaves, typically appearing in early summer; remove and dispose of affected leaves promptly.