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Botanical Interests

Steel Blue Sea Holly Seeds

Steel Blue Sea Holly Seeds

Regular price $2.29
Regular price Sale price $2.29
(~320 seeds)
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Product Details

Sea holly brings extraordinary architectural beauty to the garden by day, and wonderment at night as it reflects the silvery moonlight. It blooms profusely through the summer, attracting pollinators and providing garden interest in winter with long-standing blooms. Cut flowers are captivating in fresh or dry arrangements. This tough plant thrives in poor soil, heat, and drought, and even tolerates salty soil as found in coastal areas. Perennial in USDA zones 5–9. Deer and rabbit resistant.

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  • Variety Info
  • Sowing Info
  • Growing Info

Variety Info

Family: Apiaceae

Native: Europe and Asia

Hardiness: Perennial in USDA zones 5–9

Exposure: Full sun

Bloom Period: Summer to frost

Plant Dimensions: 24"–48" tall

Variety Info: ½"–1" flower heads made up of many tiny flowers start out green and turn to silvery-blue as the flowers open.

Attributes: Attracts Pollinators, Cut Flower, Drought Tolerant, Heat Tolerant, Deer Resistant, Rabbit Resistant

Sowing Info

When to Sow Outside: Sow in fall or late winter.

When to Start Inside: RECOMMENDED: 10 to 12 weeks before your average last frost date. Ideal soil temperature for germination is 70°–75°F.

Days to Emerge: 7–90 Days

Seed Depth: Press into surface

Seed Spacing: A group of 3 seeds every 18"–24"

Thinning: When 1" tall, thin to one every 18"–24"

Growing Info

Harvesting: For longest vase life, harvest in the morning and change vase water frequently. For Drying: Harvest flowers when they are green; they will resist turning brown over time.