Andropogon gerardii Vitman
Andropogon gerardii is a grass.
Andropogon gerardii was described by Fulgenzio Vitman in 1792. The name is considered as validly published.
The comparatively long-lived grasses have a erect habit and have an upright habit. They reach heights of 1,8 to 2 metres and spread slowly. The main growing season is in summer. The plants reach a width of 0.5 to 1 metres.
Andropogon gerardii is deciduous. The fern-green, simple leaves are alternate. They are linear with entire margins and parallel venation. The foliage is dense in summer and porous in winter.
Flowers and Fruits
Andropogon gerardii produces spikes of yellow flowers from June to September.
The grasses produce ornamental brown caryopses from summer to autumn.
The plants form fibrous roots.
Andropogon gerardii is native to North America.
The grasses prefer a sunny situation on moderately moist soil. The substrate should be sandy-loamy, gritty-loamy or sandy clay and comparatively poor with a pH between 6 and 7,5. The plants need a soil depth of at least 51 centimetres for good growth. They tolerate temperatures down to -35Â°C (USDA zone 4) and need a frost-free period of at least 22 weeks.
Classification after Prof. Dr. Sieber
- flower beds (rich soil)
Tolerance of special soil conditions
- medium: soil salinity, anaerobic soil
- high: drought, calcareous soil, city climate
The recommended planting distance is 40 to 50 centimetres, the grasses are best planted in groups of 3 to 5.
Maintenance and Propagation
The plants need little to no maintenance if grown under suitable conditions.
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.