Botanical Name: Delphinium elatum
Native: Asia and Europe
Hardiness: Hardy perennial in USDA zones 3-7. In warmer zones, plants are short-lived and treated as annuals sown in late summer/fall for spring bloom.
Plant Dimensions: 3'–6' tall
Exposure: Full sun
Bloom Period: Spring to early summer
Attributes: Attracts Hummingbirds, Attracts Pollinators, Cut Flower, Deer Resistant
When to Sow Outside: 1 to 2 weeks after your average last frost date, or as late as 2 months before your average first frost date, and when soil temperature is 60°–70°F.
When to Start Inside: 6 to 8 weeks before your average last frost date. In mild climates, start in midsummer to transplant in fall for spring bloom.
Days to Emerge: 15 – 20 days
Seed Depth: ¼"
Seed Spacing: A group of 6 seeds every 24"
Thinning: When 3" tall, thin to 1 every 24"