Delphinium has a beautiful flower shape, like a little blue swallow standing on a branch, hence its name. It is an annual or biennial herbaceous flower of Ranunculaceae, with a plant height of 80 ~ 120cm and a flowering period of May ~ June.

Delphinium likes sunny and ventilated environment, sunny and semi-cloudy, high and dry but not dry, cold and cool, and should avoid damp heat. The soil is rich in humus and well drained.

Sowing and breeding can be carried out in spring and autumn. Spring sowing in northern China, greenhouse sowing or direct seeding in March and April, germination temperature 10 ~ 15℃. Before sowing, put the seeds in the refrigerator for 2 ~ 3 days, and then put them in the shade. Delphinium is slow to germinate, and it takes about 15 ~ 20 days to germinate. The root system is straight root, with few fibrous roots, which is not resistant to transplantation and has good direct seeding effect. If you need to transplant when there are 3 ~ 4 real leaves, be careful not to touch the clods when transplanting, otherwise it will be difficult to survive. Autumn sowing, cold bed overwintering and spring sowing are carried out in the middle and late August.

In terms of fertilizer and water management, basal fertilizer and phosphate fertilizer are applied during planting, and phosphorus and potassium fertilizer are applied every month in the growing period 1 time, and topdressing 1 time in the flourishing period. Although delphinium likes high dry environment, it has few fibrous roots and is not drought-tolerant, but it should not be too wet, so it needs a small amount of irrigation at seedling stage and growth stage.

Delphinium plants are tall and straight, with many colors and long spikes. It is an excellent material for waterside, forest edge, flower border and flower belt, and can also be used as cut flowers.