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Rust in St John's Wort
How to identify and treat rust in St John's Wort.
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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_recordOrange or brown pustules on leaf undersides
- fiber_manual_recordYellow spots on leaf tops
- fiber_manual_recordPremature leaf drop
help
Common causes in St John's Wort
Caused by various Puccinia and Phragmidium species. Spreads via windborne spores in moist conditions.
healing
How to treat rust in St John's Wort
Remove and destroy infected leaves. Apply copper or sulphur fungicide.
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Preventing rust in St John's Wort
Avoid overhead watering. Space plants adequately. Clear debris.