water weekly in summer if there is not sufficient rain
plant in soil with high organic content
fertilize with organic fertilizer or alfalfa meal every 6 weeks. Cut back after bloom, often reblooms.
These estimates for how long Larkspur takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.
Average 19 days | Min 8 days | Max 63 days (5)
Average 48 days | Min 28 days | Max 116 days (5)
Average 47 days | Min 38 days | Max 70 days (3)
Our when to plant Larkspur estimates are relative to your last frost date.
Delphinium
1 http://www.aspca.org/Pet-care/poison-control/Plants/larkspur.aspx