Troubleshooting
Ribbed Melilot problems — and how to fix them
Ribbed Melilot (Melilotus officinalis) 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.
Mould and dicoumarol risk
If plants are cut and left to dry slowly in damp conditions, fungal conversion of coumarin to toxic dicoumarol occurs; always ensure any cut material dries quickly in good airflow, and do not compost damaged wet clippings near livestock or pet areas.
Self-seeding invasiveness
Prolific seed production means plants can spread aggressively onto neighbouring ground; deadhead before seed sets if growing in a cultivated border, or it will naturalise widely.
Prevent ribbed melilot problems before they start
Most ribbed melilot issues are care-mismatch, not bad luck. Dial in the basics:
Ribbed Melilot problems — FAQ
Why is my ribbed melilot mould and dicoumarol risk?
If plants are cut and left to dry slowly in damp conditions, fungal conversion of coumarin to toxic dicoumarol occurs; always ensure any cut material dries quickly in good airflow, and do not compost damaged wet clippings near livestock or pet areas.
Why is my ribbed melilot self-seeding invasiveness?
Prolific seed production means plants can spread aggressively onto neighbouring ground; deadhead before seed sets if growing in a cultivated border, or it will naturalise widely.