- You will get 600+ Seeds of Larkspur Rocket Imperial Mix Flower Seeds. - Seller Notes ?Delphinium consolida. U.S. Grown seed. Tested 1/23 - Germination 93%. Packed 1/23.?. - Planting Time: 12 Weeks. - Soil Type: Clay, Loam, Peat, Sand. - Life Cycle: Annual. - USDA Hardiness Zone (F): 5 (-20 to -10 F). - Soil pH: Neutral. - Watering: Medium. - Sunlight: Partial Shade, Full Sun. - Larkspur Imperial Mix. aka Rocket Larkspur. U.S. Grown seed. Attracts Hummingbirds, Butterflies, Bees. Annual. Lives just one year. Grows quickly, blooms heavily, and dies with the first frost. Can regrow the following spring if seed falls on bare ground. Tall spikes covered with spurred flowers in blue to purple, pink and white. Up to 3' tall. Blooms summer into fall. This wild delphinium needs plenty of moisture, yet the area must be well-drained. Delphinium originally lived in high meadows and mountain sides in Europe. The flower stalks of this species are mainstays in the dried flower trade, so you might want to dry some of yours for permanent arrangements. Easy to grow, pretty much carefree after established. 600+Quality seeds. Thank You!. - Delphinium consolida. - Annual. - Full Sun. - Early spring, soil temp 50F+. Fall - seeds will sprout in early spring. - SOW 1/8" deep, 4" apart. Cover lightly. Keep Moist. - Germinates in 15 to 30 days. - Medium water. Light fertilizer. - Flowers are a mix. Blooms from mid-summer through late fall.