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Botrytis Blight in Lisianthus
How to identify and treat botrytis blight in Lisianthus.
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Lisianthus care requirements
water
Keep soil consistently moist but not waterlogged; water when the top inch feels dry. Avoid wetting foliage to prevent fungal issues.
soil
Use well-draining, fertile potting mix enriched with organic matter; pH 6.0–7.0.
light
Bright, indirect light for 14–16 hours daily; avoid direct afternoon sun which can scorch petals.
symptoms
Symptoms to look for in Lisianthus
- 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 Lisianthus
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 Lisianthus
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 Lisianthus
Avoid overhead watering and overcrowding, water at soil level, deadhead spent flowers promptly, and ensure good ventilation, especially in humid weather.