Troubleshooting
Jagged Lavender problems — and how to fix them
Jagged Lavender (Lavandula pinnata) 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.
Frost damage and dieback
Even a brief frost below 0°C (32°F) blackens and kills soft growth; a hard frost kills the plant to the roots. Move containers under glass before the first autumn frost and maintain minimum 2–3°C overnight.
Botrytis (grey mould) when overwintering
In cool, poorly ventilated glass houses, grey mould develops on the fine foliage and stems during winter dormancy. Remove any dead or damaged material promptly and ventilate on mild days.
Prevent jagged lavender problems before they start
Most jagged lavender issues are care-mismatch, not bad luck. Dial in the basics:
Jagged Lavender problems — FAQ
Why is my jagged lavender frost damage and dieback?
Even a brief frost below 0°C (32°F) blackens and kills soft growth; a hard frost kills the plant to the roots. Move containers under glass before the first autumn frost and maintain minimum 2–3°C overnight.
Why is my jagged lavender botrytis (grey mould) when overwintering?
In cool, poorly ventilated glass houses, grey mould develops on the fine foliage and stems during winter dormancy. Remove any dead or damaged material promptly and ventilate on mild days.