The Delphinium formosum was ne of the most generally useful and accommodating of all flowers in the Victorian garden. There were many varieties about, the best being the branching, the hyacinth-flowered and the rocket, all of which came in many colours save yellow.
Perennial larkspurs could be raised from seed or division, and were very hardy in almost all positions. They needed to be lifted and divided every three years in spring.
Seed should be sown in summer or autumn in shallow pans in a good sandy loam without any manure. The seed pans then needed to go in a frame, and covered with some material in order to prevent evaporation. As soon as plants appear the shade cloth must be removed and the frame ventilated. By autumn, if sufficiently grown, they could be transplanted to their permanent location.
Information and image taken from F. Edward Hulme and Shirley Hibberd, Familiar Garden Flowers (Cassell, Peter, Galpin and Co.: London: c. 1890), 5 vols.