Delphinium is a perennial herb of Delphinium in Ranunculaceae. Because of its unique flower shape, it looks like a swallow, hence the name. The flower diameter is about 4 cm, which is elegant and charming. It is 35 ~ 65 cm high, with sparse branches and palmately divided leaves. The raceme has 3- 15 flowers, petal-shaped, blue or purple-blue, and is 1.5- 1.8 cm long. Delphinium is a straight-rooted plant with few fibrous roots, which is suitable for direct seeding and transplanting with soil. Cold-resistant, like sunshine, afraid of summer heat, avoid waterlogging, suitable for growth in deep and fertile sandy soil. Originated in southern Europe, it is cultivated in all provinces of China. "

-Baidu Encyclopedia