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Botrytis (Grey Mould) in Brussels Sprouts

How to identify and treat botrytis (grey mould) in Brussels Sprouts.

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Brussels Sprouts care requirements

water
Keep soil consistently moist with 1–1.5 inches water weekly; even moisture prevents hollow heart defects and splitting
soil
Rich, well-draining loam with pH 6.0–7.5; incorporate compost or aged manure; high fertility supports bud development
light
Full sun (6–8 hours daily); adequate light ensures compact, tight sprout formation
symptoms

Symptoms to look for in Brussels Sprouts

  • fiber_manual_recordGrey fuzzy mould on leaves, flowers, or fruit
  • fiber_manual_recordBrown rotting tissue
  • fiber_manual_recordCollapsed flowers
help

Common causes in Brussels Sprouts

Caused by Botrytis cinerea. Thrives in cool, humid conditions with poor air circulation.

healing

How to treat botrytis (grey mould) in Brussels Sprouts

Remove all affected tissue. Improve air flow. Apply fungicide.

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Preventing botrytis (grey mould) in Brussels Sprouts

Good air circulation. Remove dead plant material promptly. Avoid overhead watering.