Rosa woodsii Lindl.
Rosa woodsii, commonly known as western wild rose, is a shrub.
Rosa woodsii was described by John Lindley in 1820. The name is considered as validly published.
The shrubs reach heights of 50 to 150 centimetres. The plants reach a width of 1 to 1.5 metres.
Wood and Bark
The bark is reddish brown.
Rosa woodsii is deciduous. The imparipinnate leaves are alternate. The elliptic leaflets are serrate and petiolate.
Flowers and Fruits
Rosa woodsii produces corymbs of pink five-stellate flowers from May to July. The plants are hermaphroditic.
The shrubs carry orange hips.
Rosa woodsii is native to Alaska, Canada, the whole of the US with the exception of the Southwest, the Southeast of the US, Florida and North Mexico.
The shrubs prefer a sunny to half-shady situation on dry to moderately moist soil. They prefer sandy-loamy or gritty-loamy soil with a pH between 5 and 8. The plants need a soil depth of at least 30 centimetres for good growth. They tolerate temperatures down to -29Â°C (USDA zone 5).
Tolerance of special soil conditions
- medium: calcareous soil
The recommended planting distance is 1,2 to 1,5 metres.
Maintenance and Propagation
Pests and Diseases
Honeydew, galls and distorted leaves are a sign for an infestation with aphids. Use an insecticide or control biologically , e.g. with parasitic wasps or predators such as Aphidoletes aphidimyza.
Leaf blotches are a sign of a fungal or bacterial infection. Bacterial spots are rather angular and yellow-rimmed while fungal spots usually are rather rounded with an area of fruiting bodies. Destroy affected parts, additionaly apply fungizide it is is a fungal infection.
- 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.