Agrostis hyemalis (Walter) Britton, Sterns & Poggenb.
Agrostis hyemalis is a grass.
Agrostis hyemalis was already described and the name validly published by Thomas Walter. It was Nathaniel Lord Britton, Emerson Ellick Sterns and Justus Ferdinand Poggenburg, however, who reclassified it into todays valid botanical systematics in 1888.
The comparatively short-lived grasses reach heights of 30 to 100 centimetres, they have a erect habit and have an upright habit. The main growing season is from spring to fall.
Agrostis hyemalis is deciduous. The dark-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
Agrostis hyemalis produces green flowers from April to May.
The grasses produce only few brown caryopses from summer to autumn.
The plants form fibrous roots.
The grasses prefer a sunny situation on moderately moist soil. They prefer soil with a pH between 5 and 7,5 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 19 weeks.
Tolerance of special soil conditions
- none: calcareous soil
- low: drought
- medium: soil salinity
- high: anaerobic 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.