In North America, several species of Indigofera are occasionally grown as ornamental subjects. In the North, they are mostly greenhouse subjects. Propagated by seeds or cuttings, chiefly the latter. Recent introductions are I. amblyantha and I. kirilovwii, excellent species and hardy at the Arnold Arboretum. | In North America, several species of Indigofera are occasionally grown as ornamental subjects. In the North, they are mostly greenhouse subjects. Propagated by seeds or cuttings, chiefly the latter. Recent introductions are I. amblyantha and I. kirilovwii, excellent species and hardy at the Arnold Arboretum. |