Lobelia erinus

Lobelia erinus (edging lobelia, garden lobelia or trailing lobelia) is a species of flowering plant in the bellflower family Campanulaceae, native to southern Africa. It is a low growing, prostrate or scrambling herbaceous perennial plant growing to 8–15 cm tall. The basal leaves are oval, 10 mm long and 4–8 mm broad, with a toothed margin; leaves higher on the stems are slender and sometimes untoothed. The flowers are blue to violet in wild plants, with a five-lobed corolla 8–20 mm across; they are produced in loose panicles. About 0.5 to 4.5 inches long inflorescence stems are about 5 inches long, loose racemose inflorescences with many flowers. The hermaphrodite flower is zygomorphic with a length of up to 1 centimeter and quinate with double perianth. The five sepals are fused. The fan-shaped lower lip is trilobed. The color of the crown varies depending on the variety between white, blue, purple, purple, pink or red the center is yellow or white. The five stamens are 3 to 7 millimeters long. The fruit is a 5–8 mm capsule containing numerous small seeds. The distribution area lies in southern southern Africa and extends from Malawi, Mozambique, Zambia and Zimbabwe to the south to Botswana, Namibia, Swaziland, Lesotho and the South African provinces. Lobelia erinus is a very popular edging plant in gardens, especially for hanging baskets and window boxes. In temperate areas of the world, its varieties are popular ornamental plants for gardens and balconies. Some of the varieties are propagated with seeds, other varieties are vegetatively propagated only through cuttings; it depends on whether the varieties are 'seedy'. It has a particularly long flowering period, from mid spring to early autumn. It is perennial where temperatures remain above freezing, and is often grown as an annual plant in colder areas. It is widely available in Spring as a young plant, but must be kept indoors until all danger of frost has passed. Numerous cultivars have been selected, either with a bushy or a trailing habit, in a wide range of flower colours, including white, pink, magenta ('red'), pale to dark blue, and purple, often with a prominent white eye. Some of the better known cultivars include 'Blue Moon', 'Gracilis', 'Crystal Palace', 'Sapphire', 'Rosamund' and 'Riviera Rose'. In the United Kingdom the following cultivars have gained the Royal Horticultural Society's Award of Garden Merit: