warning
Yellow Leaves in St John's Wort
verifiedReviewed by the GreenScout Team
St John's Wort is a hardy perennial herb with small, narrow leaves and bright yellow, five-petaled flowers that bloom profusely in summer
potted_plant
St John's Wort care requirements
These care conditions are most relevant to yellow leaves in St John's Wort. Check each one as a potential cause.
light_mode
Light
Full sun (6–8 hours daily); requires bright light for optimal flowering and compound development.
water_drop
Water
Low water needs; water moderately when young; once established, very drought-tolerant. Minimal watering needed.
science
Fertiliser
Minimal fertilizer; generally thrives without supplemental feeding; avoid overfertilizing.
symptoms
Symptoms to look for in St John's Wort
- fiber_manual_recordPale green turning yellow
- fiber_manual_recordYellowing starting from lower leaves
- fiber_manual_recordInterveinal yellowing
help
Common causes in St John's Wort
- fiber_manual_recordOverwatering
- fiber_manual_recordUnderwatering
- fiber_manual_recordNutrient deficiency
- fiber_manual_recordLow light
- fiber_manual_recordRoot rot
- fiber_manual_recordPests
troubleshoot
How to diagnose yellow leaves in St John's Wort
Check soil moisture first. Wet soil + yellow lower leaves = overwatering. Dry soil = underwatering. Yellowing between veins = nutrient deficiency.
healing
How to treat yellow leaves in St John's Wort
Adjust watering schedule. Feed with balanced fertiliser. Check for pests.
shield
Preventing yellow leaves in St John's Wort
Water only when top 2 inches of soil are dry. Feed during growing season. Provide adequate light.