This is our most popular larkspur seed with a mixture of all different shade of blue flower spikes. Larkspur are cool season annuals. Sow the seed on cold soil as soon as you can in late winter/early spring, around the same time you sow your breadseed poppies. I always let my larkspur go to seed in the garden. They self sow readily, giving you free plants year after year. Once of the very best annual cut flowers you can grow.