Troubleshooting
Fava Bean problems — and how to fix them
Fava Bean (Vicia faba) 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.
Black bean aphid (blackfly)
Dense black colonies smother growing tips and flowers; pinch out the soft tips once pods set at the base, and encourage ladybirds.
Chocolate spot
Brown blotches on leaves and stems in damp, sheltered conditions; space plants for airflow, avoid excess nitrogen, and clear debris.
Broad bean rust
Powdery brown pustules late in the season; usually cosmetic on a maturing crop, but remove badly affected foliage and rotate crops.
Plants toppling in wind
Tall stands can flop, especially when laden with pods; support rows with stakes and string around the perimeter.
Prevent fava bean problems before they start
Most fava bean issues are care-mismatch, not bad luck. Dial in the basics:
Looking for fava bean in general rather than its problems? Read the full fava bean care guide — light, water, soil and feeding.
Fava Bean problems — FAQ
Why is my fava bean black bean aphid (blackfly)?
Dense black colonies smother growing tips and flowers; pinch out the soft tips once pods set at the base, and encourage ladybirds.
Why is my fava bean chocolate spot?
Brown blotches on leaves and stems in damp, sheltered conditions; space plants for airflow, avoid excess nitrogen, and clear debris.
Why is my fava bean broad bean rust?
Powdery brown pustules late in the season; usually cosmetic on a maturing crop, but remove badly affected foliage and rotate crops.
Why is my fava bean plants toppling in wind?
Tall stands can flop, especially when laden with pods; support rows with stakes and string around the perimeter.