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Enhance your landscape with Onopordum acanthium Seeds, commonly known as Scotch Thistle Seeds. These striking biennial plants are known for their tall, sculptural form, silvery-green foliage, and bold flower heads that make an impressive statement in gardens.
Scotch Thistle is well admired for its resilience and ability to thrive in sunny, well-drained locations. Its bold structure adds height and texture to borders, naturalized areas, and large garden spaces. This hardy biennial is also known to attract pollinators and support ecological garden designs.
Easy to grow from seed, Non-GMO Onopordum acanthium Seeds offer reliable germination and vigorous growth, making them suitable for both experienced gardeners and beginners wanting to explore unique plant varieties.
Hardy biennial with tall, architectural form
Striking silvery foliage with bold purple flower heads
Thrives in sunny, well-drained garden areas
Supports pollinators and wildlife-friendly landscapes
Ideal for naturalistic gardens, borders, and large outdoor spaces
Common Name: Scotch Thistle
Scientific Name: Onopordum acanthium
Seed Type: Flowering Biennial
Color: Purple Flower Heads / Silvery Foliage
Growth Habit: Biennial
Sunlight Requirement: Full Sun
USDA Hardiness Zones: 3–8
Bloom Season: Summer
Height: 3–8 feet
Ideal Use: Borders, Wildlife Gardens, Naturalized Areas
Water Requirement: Low to Moderate
Soil Preference: Well-drained, dry to average soil
Heirloom: May vary
Non-GMO: Yes
Growth Difficulty: Easy to Moderate
Planting Season: Spring or Fall
Soil Prep: Select well-drained soil in a sunny location.
Sowing: Direct sow outdoors in early spring or fall.
Depth: Plant seeds ⅛–¼ inch deep.
Spacing: Space plants 24–36 inches apart due to their large spread.
Watering: Keep mildly moist during germination; reduce once established.
Germination Time: 14–28 days depending on climate.
Care: Allow space for full growth; remove spent flowers as needed.
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