Acanthus spinosus L.
Acanthus spinosus is a perennial.
Acanthus spinosus was described by Carl Linnaeus in 1753. The name is considered as validly published.
Acanthus spinosus is a species in the genus Acanthus which contains approximately 32 to 41 species and belongs to the family of the Acanthaceae (Acanthus Family). The type species of the genus is Acanthus mollis.
The perennials have a stemless growth and reach heights of 1,2 to 1,5 metres.
Acanthus spinosus is deciduous. The green, simple leaves are opposite. They are ovate with pinnatisect margins.
Flowers and Fruits
Acanthus spinosus produces spikes of white labiate flowers from July to August.
The perennials carry ornamental loculicidal capsules.
Acanthus spinosus is native to South Italy, Turkey, Algeria and the Balkan Peninsula.
The perennials prefer a sunny to half-shady situation on dry soil. The substrate should be sandy-loamy or gritty-loamy soil with a pH between 8 and 10. They tolerate temperatures down to -23Â°C (USDA zone 6).
Classification after Prof. Dr. Sieber
- open areas
- steppes/dry forests (usually calcareous soil)
- woodland borders (soil usually rich in humus)
Tolerance of special soil conditions
- none: waterlogging, winter dampness
The recommended planting distance is 70 centimetres, the perennials are best planted in groups of 3 to 5. Suited as cut flowers and as bee pasture.
Maintenance and Propagation
The plants need little to no maintenance if grown under suitable conditions.
- Root cuttings
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.