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Leaf Spot in St John's Wort
How to identify and treat leaf spot in St John's Wort.
potted_plant
St John's Wort care requirements
water
Low water needs; water moderately when young; once established, very drought-tolerant. Minimal watering needed.
soil
Well-draining soil; tolerates poor, sandy, rocky, or clay soils; neutral to slightly alkaline pH (6.0–7.5) preferred.
light
Full sun (6–8 hours daily); requires bright light for optimal flowering and compound development.
symptoms
Symptoms to look for in St John's Wort
- fiber_manual_recordCircular brown or black spots
- fiber_manual_recordYellow halos around spots
- fiber_manual_recordPremature defoliation
help
Common causes in St John's Wort
Multiple fungal and bacterial pathogens. Favoured by wet foliage and warm temperatures.
healing
How to treat leaf spot in St John's Wort
Remove affected leaves. Apply appropriate fungicide or bactericide.
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Preventing leaf spot in St John's Wort
Water at soil level. Improve air circulation. Practise crop rotation.