Memorial Rose (Rosa wichuraiana)
At a glance
- Lifecycle
- Perennial (hardy)
- Exposure
- Full sun
- Frost limit
- −28.9 °C
Cultivation
Succeeds in most soils. Judging by the plants native habitat, it should be resistant to maritime exposure[K]. This species usually has a procumbent habit, the stems growing along the ground and rooting at intervals. It can be trained, however, to climb and can then reach a height of 6 metres. The plant is evergreen in mild winters. Grows well with alliums, parsley, mignonette and lupins. Closely related to R. luciae. Hybridizes freely with other members of this genus. Plants in this genus are notably susceptible to honey fungus.
Propagation
Seed. Rose seed often takes two years to germinate. This is because it may need a warm spell of weather after a cold spell in order to mature the embryo and reduce the seedcoat. Prick out the seedlings into individual pots when they are large enough to handle. Plant out in the summer if the plants are more than 25cm tall, otherwise grow on in a cold frame for the winter and plant out in late spring. Cuttings of half-ripe wood with a heel, July in a shaded frame. Overwinter the plants in the frame and plant out in late spring. Cuttings of mature wood of the current seasons growth. Select pencil thick shoots in early autumn that are about 20 - 25cm long and plant them in a sheltered position outdoors or in a cold frame. Division of suckers in the dormant season. Plant them out direct into their permanent positions. Layering. Takes 12 months.
Edible uses
Young shoots - raw or cooked. They need to be peeled before use. Fruit - raw or cooked. The fruit is about 15mm in diameter, but there is only a thin layer of flesh surrounding the many seeds[K]. Some care has to be taken when eating this fruit, see the notes above on known hazards. The seed is a good source of vitamin E, it can be ground into a powder and mixed with flour or added to other foods as a supplement.
Medicinal uses
Purgative. The fruit of many members of this genus is a very rich source of vitamins and minerals, especially in vitamins A, C and E, flavanoids and other bio-active compounds. It is also a fairly good source of essential fatty acids, which is fairly unusual for a fruit. It is being investigated as a food that is capable of reducing the incidence of cancer and also as a means of halting or reversing the growth of cancers.
Material uses
An excellent ground cover for sunny banks.
Habitat
Thickets in lowland and low mountains, especially abundant near sea-shores, C. and S. Japan.
Native range
E. Asia - China, Japan, Korea.