Lactuca sativa L.
Lactuca sativa, commonly known as lettuce, belongs to the group of annual and biennial plants.
Lactuca sativa was described by Carl Linnaeus in 1753. The name is considered as validly published.
The plants are comparatively fast-growing and reach heights of 30 to 70 centimetres. The plants reach a width of 30 to 60 centimetres.
Lactuca sativa has mid-green, simple leaves that are alternate. The leaves are orbicular and entire. The surface of the leaves is glabrous.
Flowers and Fruits
Lactuca sativa produces corymbs of yellow many-stellate flowers from July to September.
The plants produce achenes.
The plants form tap roots.
The plants prefer a sunny to half-shady situation on moderately moist soil. They tolerate temperatures down to -45Â°C (USDA zone 2).
Tolerance of special soil conditions
- high: city climate
Maintenance and Propagation
The plants usually require only a moderate amount of maintenance.
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.