Troubleshooting
Comfrey problems — and how to fix them
Comfrey (Symphytum officinale) 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.
Spreads from root fragments
Even tiny pieces of the brittle taproot regrow, so it is nearly impossible to dig out once sited; choose its position carefully.
Comfrey rust
Orange pustules (Melampsorella) can disfigure leaves in damp seasons; cut affected foliage to the ground and bin it to break the cycle.
Self-seeding
Common comfrey sets viable seed and can spread where unwanted; cut spent flowers if you want to limit volunteers.
Slug damage on new shoots
Tender spring regrowth is grazed by slugs and snails; the plant usually outgrows minor damage.
Prevent comfrey problems before they start
Most comfrey issues are care-mismatch, not bad luck. Dial in the basics:
Looking for comfrey in general rather than its problems? Read the full comfrey care guide — light, water, soil and feeding.
Comfrey problems — FAQ
Why is my comfrey spreads from root fragments?
Even tiny pieces of the brittle taproot regrow, so it is nearly impossible to dig out once sited; choose its position carefully.
Why is my comfrey comfrey rust?
Orange pustules (Melampsorella) can disfigure leaves in damp seasons; cut affected foliage to the ground and bin it to break the cycle.
Why is my comfrey self-seeding?
Common comfrey sets viable seed and can spread where unwanted; cut spent flowers if you want to limit volunteers.
Why is my comfrey slug damage on new shoots?
Tender spring regrowth is grazed by slugs and snails; the plant usually outgrows minor damage.