Delphinium, Chinese (P)
Delphinium grandiflorum
Perennial. Hardy in zones 3-7.
Start inside 8-10 weeks before planting out. Lightly cover seeds, provide darkness and cool temperatures; 10-13°C (50-55°F). Should germinate in 2-3 weeks. May also be direct seeded outside in early spring or early autumn. Transplant outside in early spring, into a full sun to light shade location, 12" apart. 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 slug damage!
