200 Scottish Thistle Seeds - Onopordum acanthium Ornamental Flower Seeds

Scottish Thistle (Onopordum acanthium) is a striking biennial plant known for its tall, architectural form and distinctive spiny foliage. This ornamental thistle produces large, globe-shaped purple flower heads that attract pollinators and add dramatic interest to garden borders, wildflower meadows, and cottage gardens. Its tolerance for poor soils and drought makes it a resilient choice for challenging landscapes.

With its bold texture and impressive height, Scottish Thistle serves as a focal point in sunny gardens. The flowers are highly attractive to bees and butterflies, supporting pollinator-friendly plantings. Whether grown as a statement piece or in a naturalized setting, this thistle offers unique beauty and ecological value.

Plant Features

• Tall, architectural biennial with spiny, silvery-green foliage
• Large, globe-shaped purple flower heads
• Attracts bees and butterflies
• Drought-tolerant once established
• Ideal for wildflower meadows and cottage gardens

Growing Information

• Botanical Name: Onopordum acanthium
• Plant Type: Biennial
• Sunlight: Full Sun
• Soil: Well-drained, poor to average soil
• Water Requirements: Low to moderate; drought-tolerant once established
• Growth Habit: Upright, clump-forming
• USDA Hardiness Zones: 3-8
• Bloom Season: Summer to early fall
• Mature Height: 4-6 feet
• Spacing: 24-36 inches

Planting & Care

Sow Scottish Thistle seeds indoors 6-8 weeks before the last frost or directly outdoors in fall or early spring. Press seeds lightly into the soil surface; they need light to germinate. Keep soil consistently moist until germination, which typically occurs in 14-21 days at 65-70°F (18-21°C). Once seedlings have several true leaves, transplant them to their final location after hardening off.

Choose a sunny spot with well-drained soil. Water regularly during the first growing season to help establish a deep root system; thereafter, the plants are quite drought-tolerant. Scottish Thistle typically blooms in its second year, then may self-sow if flower heads are left to mature. Deadhead to control spread if desired. Handle with care due to the spiny foliage.

What's Included

200 Scottish Thistle seeds (Onopordum acanthium).