Milk Thistle
Silybum marianum
herbMilk thistle is a tall, spiky biennial herb native to the Mediterranean, recognizable by its white-veined green leaves and purple-pink thistle flowers. The seeds are traditionally used for liver health and medicinal purposes. This hardy plant thrives in poor soil and is drought-tolerant once established.
Common Problems
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Care Guide
Toxicity
Generally non-toxic; safe for household members. May cause mild digestive upset if consumed in excess.
Common Diseases
Common Pests
Seasonal Care
Resume regular watering and feeding as growth picks up.
Peak growing season. Water and feed regularly.
Reduce watering as growth slows. Stop heavy feeding.
Minimal watering and feeding. Protect from frost if needed.
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Frequently Asked Questions
What are Milk Thistle seeds used for?
They're traditionally used for liver health and other medicinal purposes — the seeds are the most commonly harvested part of this tall, spiky biennial.
Why does my Milk Thistle thrive in poor soil?
As a hardy Mediterranean native, it's naturally drought-tolerant once established and actually prefers poor to average soil over rich, fertile conditions.