Troubleshooting
French Lavender problems — and how to fix them
French Lavender (Lavandula dentata) 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.
Frost damage
Less hardy than English lavender, it is killed or set back by hard frost; grow in containers that can be moved into a frost-free, bright spot for winter.
Root rot in wet soil
Soggy, poorly drained ground rots the roots; use a gritty mix, ensure good drainage, and let the surface dry between waterings.
Leggy growth without pruning
Its vigorous, soft growth quickly goes woody and open; trim lightly and regularly after flushes, avoiding cuts into bare old wood.
Fungal issues in humidity
Damp, still air causes dieback on the toothed leaves; give it an open, sunny, breezy position and water at the base.
Prevent french lavender problems before they start
Most french lavender issues are care-mismatch, not bad luck. Dial in the basics:
Looking for french lavender in general rather than its problems? Read the full french lavender care guide — light, water, soil and feeding.
French Lavender problems — FAQ
Why is my french lavender frost damage?
Less hardy than English lavender, it is killed or set back by hard frost; grow in containers that can be moved into a frost-free, bright spot for winter.
Why is my french lavender root rot in wet soil?
Soggy, poorly drained ground rots the roots; use a gritty mix, ensure good drainage, and let the surface dry between waterings.
Why is my french lavender leggy growth without pruning?
Its vigorous, soft growth quickly goes woody and open; trim lightly and regularly after flushes, avoiding cuts into bare old wood.
Why is my french lavender fungal issues in humidity?
Damp, still air causes dieback on the toothed leaves; give it an open, sunny, breezy position and water at the base.