Delphinium
Delphinium: Sowing, planting and harvest calendar
Delphinium, commonly called larkspur, is a genus in the buttercup family known in gardens for its upright flower stems. Large garden selections are often complex hybrids, with Delphinium elatum among their ancestors. The genus also contains annual, biennial and perennial species, so the name delphinium alone does not establish a plant's lifespan.In tall border delphiniums, the leaves gather near the base and are deeply divided into lobes. Their outline forms a green mass distinct from the long flowering stems. The overall habit is generally upright, with flowers arranged in more or less dense clusters. Some types grow well over a metre, while compact selections and certain alpine species remain much lower. Mature size therefore depends on the group and cultivar rather than on one height shared by every delphinium.A flower has a spur, a backward-pointing extension that contributes to its distinctive outline. The most prominent coloured parts are mainly sepals,…
