Delphinium Larkspur Giant Imperial; cultivar produces 4-foot, cone-shaped spikes of double blue, pink and white flowers over feathery green foliage.Giant Imperial, and larkspur in general, needs full sun and well-drained soil so root rot doesnt stop the plant summer-long bloom. ;Giant Imperial larkspur is an ideal choice for climates with cool summers and blooms begin in early summer when started from seed. TESTED FOR GERMINATION. All seeds are packaged and for the current growing season. PLEASE SEE MY OTHER SEED LISTINGS New