Troubleshooting
Burnet Saxifrage problems — and how to fix them
Burnet Saxifrage (Pimpinella saxifraga) 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
In warm, dry summers with poor airflow, powdery white fungal coating appears on the leaves; improve spacing between plants, water at the base rather than overhead, and remove affected foliage promptly.
Carrot fly (Psila rosae)
As a member of the Apiaceae, burnet saxifrage is susceptible to carrot fly larvae tunnelling into the taproot; grow under fine insect mesh from May onwards or interplant with strong-scented herbs to deter adult flies.
Prevent burnet saxifrage problems before they start
Most burnet saxifrage issues are care-mismatch, not bad luck. Dial in the basics:
Burnet Saxifrage problems — FAQ
Why is my burnet saxifrage powdery mildew?
In warm, dry summers with poor airflow, powdery white fungal coating appears on the leaves; improve spacing between plants, water at the base rather than overhead, and remove affected foliage promptly.
Why is my burnet saxifrage carrot fly (psila rosae)?
As a member of the Apiaceae, burnet saxifrage is susceptible to carrot fly larvae tunnelling into the taproot; grow under fine insect mesh from May onwards or interplant with strong-scented herbs to deter adult flies.