🌿 Milk Thistle (Silybum marianum) — Organic Seeds

Common Names: Holy Thistle, Marian Thistle

🌱 Seed Quality Promise

All seeds sold by Yahuah’s Farm are 100% organic, non-GMO, and never chemically treated or coated.
We do not sell pelleted, dyed, chemically enhanced, or synthetic-treated seeds.
What you plant should be as pure as the medicine it becomes.

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About Milk Thistle

Milk Thistle is a bold, beautiful medicinal plant known for its marbled white-veined leaves, bright purple flower heads, and powerful traditional reputation. Native to the Mediterranean, it has spread worldwide and thrives in a wide range of climates and soil conditions.

This plant forms a large rosette of spiny, dramatic foliage in its first year and sends up tall flowering stalks in its second year. It is both ornamental and medicinal, making it a striking focal point in any herb garden.

Milk Thistle is a true apothecary plant — strong, resilient, and deeply valued.

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Traditional & Herbal Uses

Milk Thistle has been traditionally used as:

• A classic liver-supporting herb
• A traditional cleansing plant
• A tonic herb
• A traditional digestive-supporting plant
• A grounding botanical
• A traditional spring tonic
• A foundational medicinal seed
• A long-used household remedy

The seeds are the primary traditionally used part.

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Plant Characteristics

Botanical Name: Silybum marianum
Life Cycle: Biennial (sometimes annual)
Growth Habit: Upright, rosette-forming
Mature Height: 3–6 feet
Mature Width: 2–3 feet
Flower Color: Purple
Bloom Time: Late spring to summer
Foliage: Large, glossy green with white marbling
Leaf Texture: Spiny edges
Attracts: Bees, butterflies, beneficial insects

Milk Thistle is a bold statement plant.

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Growing Milk Thistle from Seed

Milk Thistle is extremely easy to grow and thrives in tough conditions.

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How to Germinate Milk Thistle Seeds

Direct Sow or Transplant

Milk Thistle seeds are large and germinate easily.

1. Sow seeds ¼–½ inch deep.

2. Keep soil lightly moist.

3. Germination occurs quickly.

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Germination Time

• 7–14 days
• Fast and reliable

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Ideal Growing Conditions

USDA Zones

Zones 3–10

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Sun

• Full sun preferred
• Tolerates partial shade

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Soil

• Well-draining
• Sandy, loamy, or rocky soils
• Thrives in poor soil

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Water

• Low to moderate
• Drought tolerant once established

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Spacing

• Space plants 18–24 inches apart
• Needs room to spread

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Growth Timeline

Weeks 1–2:
• Germination

Months 1–3:
• Rosette formation

Year 1:
• Leaf and root establishment

Year 2:
• Flowering
• Seed production

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Harvesting

Seeds

Harvest when flower heads dry and turn brown.

• Cut heads
• Dry thoroughly
• Separate seeds

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Seed Saving

Milk Thistle self-seeds readily.

1. Allow seed heads to fully dry.

2. Cut and crumble heads.

3. Separate seeds.

4. Store cool, dark, and dry.

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Why Grow Milk Thistle?

• One of the most famous medicinal seeds
• Extremely hardy
• Drought tolerant
• Beautiful ornamental plant
• Pollinator friendly
• Easy to grow
• Self-seeding
• Long medicinal history
• Low maintenance