Troubleshooting
Black Medick problems — and how to fix them
Black Medick (Medicago lupulina) 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
White, powdery fungal coating appears on leaves in warm, humid weather or dry spells following irrigation; improve airflow between plants and avoid overhead watering.
Aphid infestation
Black bean aphid (Aphis fabae) and pea aphid (Acyrthosiphon pisum) can colonise soft new growth; natural predators usually control populations in wildflower settings — intervene with insecticidal soap only on serious infestations.
Prevent black medick problems before they start
Most black medick issues are care-mismatch, not bad luck. Dial in the basics:
Black Medick problems — FAQ
Why is my black medick powdery mildew?
White, powdery fungal coating appears on leaves in warm, humid weather or dry spells following irrigation; improve airflow between plants and avoid overhead watering.
Why is my black medick aphid infestation?
Black bean aphid (Aphis fabae) and pea aphid (Acyrthosiphon pisum) can colonise soft new growth; natural predators usually control populations in wildflower settings — intervene with insecticidal soap only on serious infestations.