Delphinium Black Knight Delphinium Cultorum is a hardy perennial that is one of the most known classic garden flowers. Delphinium Black Knight seeds can be planted directly outdoors, and this tall growing Delphinium plant is one of the Pacific Giant Hybrids species that reach 6 feet in height. Black Knight Delphinium features mounding, deep-green foliage with deeply-cut leaves and produces gorgeous spikes of large dark-blue, violet flowers with a black center. Blooming all summer Delphinium can re-bloom in fall if the flower stalks are removed right after flowering. The hummingbirds are attracted to Delphinium flowers.
Delphinium Black Knight is one of the best tall perennial flowers to grow in cutting gardens, borders, and flower beds. Delphinium Pacific Giant plants looks spectacular when planted in groups. Delphinium Cultorum seeds can be covered lightly with soil, and the average germination time is 3-4 weeks. If the seeds are planted early in the spring, Delphinium Black Knight may bloom the first year, but the best blooms will be in the second year. One of the best cut flowers Delphinium Black Knight produces the best blooms when it grows in full sun and fertile, moist, well-drained soil.
Height: 70 Inches
Bloom Season: Summer/Fall
Environment: Sun/Partial Shade
Soil Type: Rich/Moist well-drained, pH 6.2-7.2
USDA Zones: 3-10
Sow Indoors: Winter/Spring (4-6 weeks before last frost)
Sow Outdoors: Spring/Summer/Fall
Seed Depth: 1/8-1/4 Inch
Germination Time: 21-28 Days