Orostachys spinosa (L.) Sweet
Orostachys spinosa is a succulent and belongs to the group of annual and biennial plants.
Orostachys spinosa was already described and the name validly published by Carl Linnaeus. It was Robert Sweet, however, who reclassified it into todays valid botanical systematics in 1830.
The plants reach heights of 10 to 30 centimetres.
Orostachys spinosa is deciduous. The glaucous, simple leaves are in rosettes. They are oblanceolate, entire and sessile.
Flowers and Fruits
Orostachys spinosa produces racemes of light-green five-stellate flowers from June to July.
The plants produce follicles.
Orostachys spinosa is native to the European Russia (Belarus, the Ukraine, Moldova, Crimea), West-Siberia, East Siberia, Xin-Jiang, Central Asia, Mongolia and Tibet.
The plants prefer a sunny situation on fresh to moist soil. The substrate should be gritty-loamy and comparatively poor. They tolerate temperatures only above at least 1Â°C (USDA zone 10). Under glass use cactus compost.
Classification after Prof. Dr. Sieber
Suited for rockeries.
Maintenance and Propagation
- Winter protection from late frost.
- For healthy growth apply a compound fertilizer at 50% concentration every 2 months during growth.
- Water freely in summer, give little water in winter.
Propagate by sowing or 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.
- 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.