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Downy Mildew in Brussels Sprouts

How to identify and treat downy mildew 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_recordYellow patches on upper leaf surface
  • fiber_manual_recordGrey-purple fuzzy growth on undersides
  • fiber_manual_recordWilting
help

Common causes in Brussels Sprouts

Caused by Peronospora and Pseudoperonospora species. Spreads in cool, humid conditions.

healing

How to treat downy mildew in Brussels Sprouts

Remove affected material. Apply copper fungicide or phosphonate.

shield

Preventing downy mildew in Brussels Sprouts

Avoid overcrowding. Water in morning. Choose resistant varieties.

Downy Mildew in Brussels Sprouts — Symptoms & Treatment | GreenScout