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Yellow Leaves in Milk Thistle
verifiedReviewed by the GreenScout Team
Milk thistle is a tall, spiky biennial herb native to the Mediterranean, recognizable by its white-veined green leaves and purple-pink thistle flowers
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Milk Thistle care requirements
These care conditions are most relevant to yellow leaves in Milk Thistle. Check each one as a potential cause.
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Light
Full sun (6–8 hours daily)
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Water
Low water needs; water moderately during growth, then allow soil to dry between waterings. Drought-tolerant once established.
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Fertiliser
Minimal fertilizer needed; a light feeding in spring is sufficient. Avoid high-nitrogen applications.
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Symptoms to look for in Milk Thistle
- fiber_manual_recordPale green turning yellow
- fiber_manual_recordYellowing starting from lower leaves
- fiber_manual_recordInterveinal yellowing
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Common causes in Milk Thistle
- fiber_manual_recordOverwatering
- fiber_manual_recordUnderwatering
- fiber_manual_recordNutrient deficiency
- fiber_manual_recordLow light
- fiber_manual_recordRoot rot
- fiber_manual_recordPests
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How to diagnose yellow leaves in Milk Thistle
Check soil moisture first. Wet soil + yellow lower leaves = overwatering. Dry soil = underwatering. Yellowing between veins = nutrient deficiency.
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How to treat yellow leaves in Milk Thistle
Adjust watering schedule. Feed with balanced fertiliser. Check for pests.
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Preventing yellow leaves in Milk Thistle
Water only when top 2 inches of soil are dry. Feed during growing season. Provide adequate light.