Rosa californica Cham. & Schltdl.
Rosa californica, commonly known as Californian rose, is a shrub.
The shrubs reach heights of 3 metres and are comparatively fast-growing and short-lived. They have a rounded habit and form thickets and spread rapidly. The main growing season is from spring to fall.
Wood and Bark
Rosa californica is deciduous. The dark-green, imparipinnate leaves are alternate. The ovate leaflets are petiolate. The foliage is dense in summer and porous in winter.
Flowers and Fruits
Rosa californica produces corymbs of showy, pink five-stellate flowers from May to August.
In autumn the shrubs produce an abundance of ornamental, edible orange hips that are persistent on the plant.
Rosa californica is native to Oregon, California and North Mexico.
The shrubs prefer a sunny to half-shady situation on dry to moderately moist soil. The substrate should be sandy-loamy or gritty-loamy and comparatively poor with a pH between 7 and 8. The plants need a soil depth of at least 15 centimetres for good growth. They tolerate temperatures down to -29Â°C (USDA zone 5) and need a frost-free period of at least 39 weeks.
Tolerance of special soil conditions
- none: soil salinity, anaerobic soil, calcareous soil
- medium: drought
The ornamental value of Rosa californica lies especially in the attractive autumn aspect and its fragrance. The recommended planting distance is 1,2 to 1,8 metres.
Maintenance and Propagation
- Plants can be cut back down to the trunk (coppicing) as necessary.
Propagate by sowing. The seeds require vernalization. Also by 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.