• Milk Thistle seeds from Southern Seeds, showing fresh silybum marianum seeds used for planting or herbal remedies.
  • Close-up of Milk Thistle seeds from Southern Seeds, showing small, brown seed grains with textured surface.
  • Southern Seeds Milk Thistle seeds, Silybum marianum, 20 seeds for planting and herbal health benefits.
  • Milk Thistle seeds by Southern Seeds, showing a close-up of healthy silybum marianum seed clusters for planting.
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Southern Seeds

Milk Thistle – 20 Seeds

Milk Thistle – 20 Seeds

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Grow a plant that is both beautiful and historic with our Milk Thistle seeds. This impressive biennial is a true showstopper, prized for its large, glossy green leaves with distinctive, milky-white veins that create a stunning marbled pattern. In its second year, it sends up a tall stalk topped with a vibrant, purple, thistle-like flower that is beloved by pollinators. With a rich history spanning thousands of years in traditional herbalism, Milk Thistle is a must-have for any serious medicinal herb garden.

⭐ What you'll love

  • Striking variegated leaves with beautiful, milky-white veins.
  • Large, vibrant purple thistle-like flowers are a favorite of bees and goldfinches.
  • One of the most important and revered medicinal herbs in traditional practices.
  • A bold, architectural plant that makes a dramatic statement in the garden.

🌿 Seed details

  • Plant Name: Milk Thistle (Silybum marianum)
  • Seed Quantity: Approx. 20 seeds
  • Type: Heirloom, Open Pollinated, Non-GMO
  • Lifecycle: Biennial
  • Height: 2-5 feet
  • Days to Maturity: Flowers in the second year.
  • USDA Zone: 5-10
  • Origin: American Grown

🌱 Growing instructions

  • Sowing: Direct sow seeds outdoors in the fall or early spring.
  • Depth: Plant seeds 1/8 inch deep.
  • Spacing: Space or thin plants to 18-24 inches apart.
  • Light Requirement: Full Sun to Partial Shade.
  • Soil: Prefers average, well-draining soil and is very drought-tolerant.
  • Harvest: Harvest seeds in the late summer of the second year after the flowers have dried.

⚠️ Please note

Due to state regulations, we cannot ship these seeds to Washington State.

✅ Our seed packets

  • Professionally designed and made.
  • Resealable for convenient, long-term storage.
  • Eco-friendly and recyclable (contains no plastic).
  • Includes full, detailed growing instructions.
  • Vigorously tested to ensure the highest germination rates.
  • Custom packets for weddings, baby showers, or events are available. Just message us!

🚚 Shipping

  • FREE SHIPPING on all orders of $35 or more.
  • Flat Rate shipping no matter how many seeds you order.
  • Tracking is included with every order.
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Fast and free shipping on most orders $75+

We offer fast and free shipping on most orders over $75 and $8.99 under $75. Orders are typically processed within 1-2 business days and delivered within 3-5 business days unless specified. Expedited shipping options and all pricing options are available at checkout if applicable.

We accept returns within 30 days of purchase. Items must be unused and in original packaging. To initiate a return, please contact our customer service team. Refunds will be processed within 5-7 business days after we receive your return.

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