Blue Mirror Delphinium
Delphinium grandiflorum. This perennial of unequalled beauty is also known as Chinese Delphinium. The true-blue flowers on this elegant plant, bloom for most of the summer making it splendid as a cut flower or in borders. A classy, elegant plant for borders and splendid as cut flowers. Blooms most of the summer. Start seed indoors 8-10 weeks before last frost. Height 20”. Approx. 75 seeds/pkg.
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Start inside 8-10 weeks before planting out. Lightly cover seeds, provide darkness and cool temperatures (50-55 degrees F). Should germinate in 2-3 weeks. Transplant outside in early spring, into a full sun to light shade location, 12 inches apart.
May also be direct seeded outside in early spring or early autumn. If planting in autumn, plant with at least six weeks before the ground freezes for the best root growth.
Delphiniums prefer rich soil, so work in compost or manure. Add bone meal each spring and fertilize regularly Deadheading regularly will keep Chinese delphiniums blooming all summer. Unlike the Elatum or Pacific Hybrids, these dwarf Delphiniums can withstand hot, dry conditions. Plants may be short lived so replace every 2-3 years. Watch out for slugs!