Delphinium King Arthur Delphinium Cultorum is a highly popular garden perennial plant. Commonly planted directly outdoors Delphinium King Arthur seeds can be also started indoors for the plant early establishment. The impressively tall and erect Delphinium King Arthur is one of the Pacific Giant Hybrids varieties that are the tallest Delphiniums available. Delphinium King Arthur forms clumps of basalt-green foliage with palmately lobed leaves and produces enormous spikes of large, semi-double, deep-purple, reddish-violet flowers with a white "bee" in the center. Delphinium blooms from early to mid summer, and its showy flowers attract butterflies and hummingbirds. If the main flower stalks are cut down after first blooms, Delphinium can re-bloom in fall.
Delphinium King Arthur adds a lot of drama to perennial borders and flower beds, and this tremendously showy flower is great for group planting in cottage and cutting gardens. Delphinium Cultorum seeds can be covered lightly with soil, and the seeds germinate in 21-28 days if the growing conditions are adequate. The full sun and rich, moist, well-drained soil are the perfect environment for growing Delphinium Pacific Giant, but the plant can tolerate some partial shade. Delphinium King Arthur is an excellent cut flower for any fresh floral arrangement.
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