Allium cernuum Roth
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Allium cernuum belongs to the group of bulbous and tuberous plants.
Allium cernuum was described by Albrecht Wilhelm Roth in 1798. The name is considered as validly published.
- lady's leek
- nodding onion
- wild onion
Allium cernuum is a species in the genus Allium which contains approximately 943 to 1011 species and belongs to the family of the Alliaceae (Garlic Family). The type species of the genus is Allium sativum.
The plants are comparatively long-lived and reach heights of 30 to 60 centimetres.
Allium cernuum is deciduous. The green, simple leaves are basal. They are linear with entire margins and parallel venation.
Flowers and Fruits
Allium cernuum produces umbels of dark-pink campanulate flowers from June to July.
The plants produce loculicidal capsules.
Allium cernuum is native to the whole of the US with the exception of Florida and California, Canada and Mexico.
The plants prefer a sunny situation on dry to moderately moist soil. The substrate should be sandy-loamy, gritty-loamy, sandy clay, loamy clay or peaty soil with a pH between 8 and 10. They tolerate temperatures down to -23Â°C (USDA zone 6).
Classification after Prof. Dr. Sieber
Tolerance of special soil conditions
- none: drought, calcareous soil
The ornamental value of Allium cernuum lies especially in its fragrance. The recommended planting distance is 20 to 30 centimetres, the plants are best planted in groups of 5 to 10. Suited for roof greening, as well as suited as cut flowers and as bee pasture.
Maintenance and Propagation
The plants usually need very little maintenance.
- Cut back after flowering.
Propagate by sowing or by bulblets.
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.