Merwilla plumbea (Lindl.) Speta
Merwilla plumbea belongs to the group of bulbous and tuberous plants.
Merwilla plumbea was already described and the name validly published by John Lindley. It was Franz Speta, however, who reclassified it into todays valid botanical systematics in 1998.
The plants reach heights of 30 to 100 centimetres.
Merwilla plumbea is deciduous. The simple leaves are basal. They are lanceolate with entire margins.
Flowers and Fruits
Merwilla plumbea produces racemes of light-blue six-stellate flowers from May to June.
The plants produce loculicidal capsules.
The plants prefer a sunny situation on dry to moderately moist soil. The substrate should be gritty loam. They tolerate temperatures down to -7Â°C (USDA zone 9).
Classification after Prof. Dr. Sieber
- woods (soil usually rich in organic material)
Suited for naturalizing and for nature gardens.
Maintenance and Propagation
- Remove withered flowers.
- The leaves should be left on the plants after flowering so that they can gather strength for the following year.
- Plant in late summer 8 centimetres deep.
Propagate by sowing seed in a cold frame when seeds are ripe or by bulblets in late summer.
Pests and Diseases
Disfigured and discoloured leaves and flowers indicate a viral infection. Remove affected plants and control insects that may spread the disease.
- 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.