Troubleshooting
Rough Chervil problems — and how to fix them
Rough Chervil (Chaerophyllum temulum) 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.
Misidentification as edible umbellifers
The gravest risk: rough chervil closely resembles cow parsley (Anthriscus sylvestris) and other edible Apiaceae; always identify by the hairy, purple-spotted stems with swollen nodes before handling.
Skin photosensitisation from sap
Furanocoumarins in the sap cause phototoxic burns on skin exposed to sunlight; wear gloves and long sleeves when handling and wash hands thoroughly afterwards.
Prevent rough chervil problems before they start
Most rough chervil issues are care-mismatch, not bad luck. Dial in the basics:
Rough Chervil problems — FAQ
Why is my rough chervil misidentification as edible umbellifers?
The gravest risk: rough chervil closely resembles cow parsley (Anthriscus sylvestris) and other edible Apiaceae; always identify by the hairy, purple-spotted stems with swollen nodes before handling.
Why is my rough chervil skin photosensitisation from sap?
Furanocoumarins in the sap cause phototoxic burns on skin exposed to sunlight; wear gloves and long sleeves when handling and wash hands thoroughly afterwards.