Troubleshooting
Lavandin problems — and how to fix them
Lavandin (Lavandula x intermedia) 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.
Root rot in wet soils
Despite overall vigour, lavandin is just as susceptible to Phytophthora root rot as other lavenders. Ensure perfect drainage; grow on a slight slope or raised mound in gardens with heavy clay or high rainfall.
Woodiness and bare base
Becomes coarse and open without annual pruning. Cut back by up to one-half after flowering each summer, but never into old, leafless wood. Hard renovation pruning of very old plants rarely succeeds.
Frost damage to new growth
Late frosts can damage new spring growth, especially after premature pruning. Prune after the last frost date; in borderline-hardy zones (5–6) protect crowns with a dry mulch of grit or coarse bark in winter.
Prevent lavandin problems before they start
Most lavandin issues are care-mismatch, not bad luck. Dial in the basics:
Looking for lavandin in general rather than its problems? Read the full lavandin care guide — light, water, soil and feeding.
Lavandin problems — FAQ
Why is my lavandin root rot in wet soils?
Despite overall vigour, lavandin is just as susceptible to Phytophthora root rot as other lavenders. Ensure perfect drainage; grow on a slight slope or raised mound in gardens with heavy clay or high rainfall.
Why is my lavandin woodiness and bare base?
Becomes coarse and open without annual pruning. Cut back by up to one-half after flowering each summer, but never into old, leafless wood. Hard renovation pruning of very old plants rarely succeeds.
Why is my lavandin frost damage to new growth?
Late frosts can damage new spring growth, especially after premature pruning. Prune after the last frost date; in borderline-hardy zones (5–6) protect crowns with a dry mulch of grit or coarse bark in winter.