Agoseris grandiflora (Nutt.) Greene
Agoseris grandiflora is a perennial.
Agoseris grandiflora was described by Carl Ernst Otto Kuntze in 1891. The name is considered as validly published.
Agoseris grandiflora is a species in the genus Agoseris which contains approximately 16 to 42 species and belongs to the family of the Asteraceae (Aster Family). The type species of the genus is Agoseris glauca.
The perennials reach heights of to 100 centimetres, the main growing season is in spring. They have a prostrate habit and are comparatively short-lived.
Agoseris grandiflora is deciduous. The dark-green, simple leaves are in rosettes. They are oblanceolate with ciliate margins. The foliage is porous.
Flowers and Fruits
Agoseris grandiflora produces showy yellow many-stellate flowers from March to May.
The perennials produce brown achenes in summer.
Agoseris grandiflora is native to California, Idaho, Montana, Nevada, Oregon, Utah and Washington.
The perennials prefer a sunny situation. They prefer soil with a pH between 5,8 and 7,3 and need a soil depth of at least 20 centimetres for good growth. They tolerate temperatures down to -35Â°C (USDA zone 4) and need a frost-free period of at least 17 weeks.
Tolerance of special soil conditions
- none: soil salinity
- low: anaerobic soil
- medium: drought, calcareous soil
Maintenance and Propagation
Propagate by sowing.
Pests and Diseases
- Walter Erhardt, Erich GÃ¶tz, Nils BÃ¶deker, Siegmund Seybold: Der groÃe Zander. Eugen Ulmer KG, Stuttgart 2008, ISBN 978-3-8001-5406-7. (Ger.)
- Christoper Brickell (Editor-in-chief): RHS A-Z Encyclopedia of Garden Plants. Third edition. Dorling Kindersley, London 2003, ISBN 0-7513-3738-2.