Delphinium Seeds - Delphinium Cultorum Astolat Flower Seed

Delphinium Seeds - Astolat

Flower Specifications

Season: Perennial

USDA Zones: 3 - 8

Height: 70 inches

Bloom Season: Summer

Bloom Color: Pink

Environment: Full sun

Soil Type: Rich, well-drained, pH 6.6 - 7.5

Deer Resistant: Yes

House Plant: No

Latin Name: Delphinium Cultorum

Planting Directions

Temperature: 55F

Average Germ Time: 14 - 21 days

Light Required: No

Depth: 1/8 - 1/4 inch

Sowing Rate: 4 - 5 seeds per plant

Moisture: Keep seed moist until germination

Plant Spacing: 30 inches

Delphinium (Delphinium Cultorum Astolat) - Start Delphinium seeds and grow this tall and stately flower in the sunny border. Astolat is from the Pacific Giant Hybrids, and it has blooms of pink shades with a contrasting black center often called a "bee". The flowering spikes are dramatic accents in perennial borders with a height of nearly 70 inches. Grow this impressive flower from flower seed and create a striking background in the summer flower garden! Hummingbirds and butterflies will not leave these flowers alone. Delphiniums make great cut flowers as well.

Delphiniums are perennial in cool summer climates, but grown as annuals or biennials, especially where summers are hot. Sow the flower seeds in early spring when frost season is completely over. Seedlings started in spring may not bloom until the next spring. For large flower spikes, give rich, well-drained soil and regular feeding. Stake tall plants and protect from strong winds.

To get a jump start on the growing season, sow Delphinium seeds indoors 4 - 6 weeks before last frost. Use sterile starter mix in trays and cover flower seeds 1/8 - 1/4 inches.

Delightful Garden Flower

The Cultorum series of delphinium is known for growing dense and tall! True to its name, this plant blooms all summer long.

Delightful Garden Flower

Unique Cut Flower

How to Grow

Sow these seeds indoors 4-6 weeks before the last expected frost. Plant at a depth of 1/4 inch, and make sure to keep seeds moist until germination. Seedlings can be transplanted outdoors after frost danger has passed. These seeds can also be sown directly outdoors anywhere from spring through fall, although they will bloom much later than if planted indoors. Plant after frost danger has passed. Delphinium plants are heavy feeders, so make sure to apply a balanced liquid fertilizer every month. Plants should be spaced approximately 30 inches apart for best performance.

  • Environment: full sun
  • Soil: rich and well-drained w' pH 6.6-7.5
  • Sowing rate: 4-5 seeds per plant
Unique Cut Flower

Plant Specifications

Delphinium is a perennial flowering plant that grows in USDA zones 3 through 8. They are known for serving well as unique cut flowers with their tall flower spikes, and they are great at attracting butterflies and hummingbirds.

  • Bloom color: pink
  • Bloom season: summer
  • Plant height: 70 inches