Carex flacca Schreb.
Carex flacca is a grass.
Carex flacca was described by Johann Christian Daniel von Schreber in 1771. The name is considered as validly published.
Carex flacca is a species in the genus Carex which contains approximately 2264 to 2485 species and belongs to the family of the Cyperaceae (Sedge Family). The type species of the genus is Carex hirta.
The grasses are comparatively slow-growing and reach heights of 20 to 35 centimetres. The plants reach a width of 30 to 60 centimetres.
Carex flacca is deciduous. The bluish green, simple leaves are alternate. They are linear with entire margins and parallel venation.
Flowers and Fruits
Carex flacca produces spikes of green flowers from May to July. The plants are dioecious.
The grasses produce nuts.
Carex flacca is native to the whole of Europe, Turkey, northern Iraq, Cyprus, the Caucasus, Iran, Pakistan and North Afrika.
The grasses prefer a sunny to half-shady situation on dry soil. The substrate should be gritty loam with a pH between 8 and 10. They tolerate temperatures down to -29Â°C (USDA zone 5).
Classification after Prof. Dr. Sieber
- open areas
Tolerance of special soil conditions
- none: drought
The recommended planting distance is 30 to 40 centimetres, the grasses are best planted in groups of 5 to 10. Suited for rockeries, roof greening and for mixed borders, as well as suited as groundcover, container plant and as specimen plant.
Maintenance and Propagation
- Remove runners if no spreading is desired.
Propagate by division.
Pests and Diseases
Honeydew, galls and distorted leaves are a sign for an infestation with aphids. Use an insecticide or control biologically , e.g. with parasitic wasps or predators such as Aphidoletes aphidimyza.
Brown, orange or yellowish pustules on shoots and on the leaves lower surfaces are very likely caused by a fungal infestation (rust). Remove affected parts and apply fungicide. Also improve ventilation and reduce humidity.
- 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.