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Botrytis Blight in Sweetpeas

How to identify and treat botrytis blight in Sweetpeas.

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Sweetpeas care requirements

water
Water regularly and deeply; 1–1.5 inches per week. Keep soil consistently moist but not waterlogged. Mulch to retain moisture and keep roots cool.
soil
Well-draining, fertile loam with pH 6.0–7.0. Enrich with compost or aged manure before planting. Good structure supports vigorous growth and deep root development.
light
Full sun (6–8 hours daily) essential for flowering and pod production. Some afternoon shade tolerated in hot climates.
symptoms

Symptoms to look for in Sweetpeas

  • fiber_manual_recordFuzzy grey-brown mould on flowers, leaves, or stems
  • fiber_manual_recordWater-soaked spots that turn brown and mushy
  • fiber_manual_recordBlighted flower buds that fail to open
help

Common causes in Sweetpeas

Caused by the fungus Botrytis cinerea (grey mould), which thrives in cool, humid conditions with poor air circulation, often spreading rapidly on damaged or ageing plant tissue.

healing

How to treat botrytis blight in Sweetpeas

Remove and destroy all affected plant material immediately, improve airflow around the plant, and apply a fungicide labelled for Botrytis if the infection is spreading.

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Preventing botrytis blight in Sweetpeas

Avoid overhead watering and overcrowding, water at soil level, deadhead spent flowers promptly, and ensure good ventilation, especially in humid weather.