Very well known as an, but there are also .
Annuals are grown for the sake of their impressive height; perennials in colour borders.
Any ordinary garden soil.
Annuals are sown out of doors in mid spring; perennials are increased by division.
annuus: The best known annual species. Height normally 2 m, but the record is close to 7 m. The are yellow with a brown-black disc; and up to 50 cm in diameter. There are also dwarf strains and forms with red-brown linear petals.
Helianthus decapetalus: Hardy perennial, height 1-2 m; medium-sized yellowin late summer to mid autumn. ‘Soleil d’Or’ is double.
Helianthus salicifolius: Height 1-2 m; yellow flowers in early to mid autumn. The ornamental value lies mainly in the drooping linear, which remind one of a willow tree. Damp soil.