Troubleshooting
Broad-Leaved Lavender problems — and how to fix them
Broad-Leaved Lavender (Lavandula latifolia) 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.
Winter dieback in cold-wet soils
The combination of cold and waterlogged soil causes crown rot; plant on a slope or raised bed and mulch with gravel around the crown rather than organic matter.
Xylella fastidiosa (high-risk pest)
Spike lavender is a confirmed host of Xylella fastidiosa, a bacterial disease spread by sap-sucking insects that causes rapid wilt and plant death. This is a notifiable pest in the UK and EU — report suspected cases immediately to the relevant plant health authority.
Prevent broad-leaved lavender problems before they start
Most broad-leaved lavender issues are care-mismatch, not bad luck. Dial in the basics:
Broad-Leaved Lavender problems — FAQ
Why is my broad-leaved lavender winter dieback in cold-wet soils?
The combination of cold and waterlogged soil causes crown rot; plant on a slope or raised bed and mulch with gravel around the crown rather than organic matter.
Why is my broad-leaved lavender xylella fastidiosa (high-risk pest)?
Spike lavender is a confirmed host of Xylella fastidiosa, a bacterial disease spread by sap-sucking insects that causes rapid wilt and plant death. This is a notifiable pest in the UK and EU — report suspected cases immediately to the relevant plant health authority.