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Uses

Toxic parts

There is a layer of hairs around the seeds just beneath the flesh of the fruit. These hairs can cause irritation to the mouth and digestive tract if ingested.

Edible uses

Notes

Fruit - raw or cooked[1][2]. The fruit can be very large for a rose, and can be up to the size of a small apple[3]. The fruit is up to 30mm in diameter[4], 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.

Petals - used as a flavouring in sorbets, confections etc. Very fragrant[3].

The seed is a good source of vitamin E, it can be ground and mixed with flour or added to other foods as a supplement[5][3]. Be sure to remove the seed hairs[5].

Flowers

Fruit

Material uses

There are no material uses listed for Rosa gigantea.

Medicinal uses(Warning!)

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[6].

Unknown part

Ecology

Ecosystem niche/layer

Ecological Functions

Nothing listed.

Forage

Nothing listed.

Shelter

Nothing listed.

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[7]. One possible way to shorten this time is to scarify the seed and then place it for 2 - 3 weeks in damp peat at a temperature of 27 - 32°c (by which time the seed should have imbibed). It is then kept at 3°c for the next 4 months by which time it should be starting to germinate[7]. Alternatively, it is possible that seed harvested 'green' (when it is fully developed but before it has dried on the plant) and sown immediately will germinate in the late winter. This method has not as yet(1988) been fully tested[7]. Seed sown as soon as it is ripe in a cold frame sometimes germinates in spring though it may take 18 months[K]. Stored seed should be sown as early in the year as possible and stratified for 6 weeks at 5°c[4]. It may take 2 years to germinate[4]. 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[8]. High percentage[8]. 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[8][4]. The cuttings can take 12 months to establish but a high percentage of them normally succeed[8]. Division of suckers in the dormant season. Plant them out direct into their permanent positions.

Layering. Takes 12 months[9].

Practical Plants is currently lacking information on propagation instructions of Rosa gigantea. Help us fill in the blanks! Edit this page to add your knowledge.



Cultivation

Succeeds in most soils[9], preferring a circumneutral soil and a sunny position[4]. Grows well in heavy clay soils. Dislikes water-logged soils[4].

This species is not very hardy in Britain, tolerating only light frosts[4]. Another report says that some provenances might tolerate occasional lows to -10°c[10]. It succeeds outdoors only in the milder areas of the country[9] and is best grown against a south-facing wall[11]. Grows well with alliums, parsley, mignonette and lupins[12][13]. Garlic planted nearby can help protect the plant from disease and insect predation[12][13]. Grows badly with boxwood[12]. Closely related to Rosa odorata, and considered to be no more than a subspecies of that plant by some botanists[14]. The edible fruit is sometimes sold in local markets in the Himalayas[3]. There is at least one named form, 'Belle Portugaise' has flowers 10 - 12cm across, the petals are rated very highly for their culinary uses[3]. Hybridizes freely with other members of this genus[7].

Plants in this genus are notably susceptible to honey fungus[4].

Crops

Problems, pests & diseases

Associations & Interactions

There are no interactions listed for Rosa gigantea. Do you know of an interaction that should be listed here? edit this page to add it.

Polycultures & Guilds

There are no polycultures listed which include Rosa gigantea.

Descendants

Cultivars

Varieties

None listed.

Subspecies

None listed.

Full Data

This table shows all the data stored for this plant.

Taxonomy
Binomial name
Rosa gigantea
Genus
Rosa
Family
Rosaceae
Imported References
Edible uses
Medicinal uses
Material uses & Functions
Botanic
Propagation
Cultivation
Environment
Cultivation
Uses
Edible uses
None listed.
Material uses
None listed.
Medicinal uses
None listed.
Functions & Nature
Functions
Provides forage for
Provides shelter for
Environment
Hardiness Zone
9
Heat Zone
?
Water
moderate
Sun
full sun
Shade
light shade
Soil PH
Soil Texture
Soil Water Retention
Environmental Tolerances
    Ecosystems
    Native Climate Zones
    None listed.
    Adapted Climate Zones
    None listed.
    Native Geographical Range
    None listed.
    Native Environment
    None listed.
    Ecosystem Niche
    None listed.
    Root Zone Tendancy
    None listed.
    Life
    Deciduous or Evergreen
    Herbaceous or Woody
    Life Cycle
    Growth Rate
    ?
    Mature Size
    Fertility
    ?
    Pollinators
    Flower Colour
    ?
    Flower Type











    References

    1. ? 1.01.1 Tanaka. T. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing (1976-00-00)
    2. ? 2.02.1 Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books ISBN 3874292169 (1984-00-00)
    3. ? 3.03.13.23.33.43.5 Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications ISBN 0-9628087-0-9 (1990-00-00)
    4. ? 4.04.14.24.34.44.54.64.74.84.9 Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press ISBN 0-333-47494-5 (1992-00-00)
    5. ? 5.05.15.2 Kavasch. B. Native Harvests. Vintage Books ISBN 0-394-72811-4 (1979-00-00)
    6. ? 6.06.1 Matthews. V. The New Plantsman. Volume 1, 1994. Royal Horticultural Society ISBN 1352-4186 (1994-00-00)
    7. ? 7.07.17.27.3 McMillan-Browse. P. Hardy Woody Plants from Seed. Grower Books ISBN 0-901361-21-6 (1985-00-00)
    8. ? 8.08.18.28.3 Sheat. W. G. Propagation of Trees, Shrubs and Conifers. MacMillan and Co (1948-00-00)
    9. ? 9.09.19.29.3 Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray (1981-00-00)
    10. ? Phillips. R. & Rix. M. Conservatory and Indoor Plants Volumes 1 & 2 Pan Books, London. ISBN 0-330-37376-5 (1998-00-00)
    11. ? Grey-Wilson. C. & Matthews. V. Gardening on Walls Collins ISBN 0-00-219220-0 (1983-00-00)
    12. ? 12.012.112.2 Philbrick H. and Gregg R. B. Companion Plants. Watkins (1979-00-00)
    13. ? 13.013.1 Riotte. L. Companion Planting for Successful Gardening. Garden Way, Vermont, USA. ISBN 0-88266-064-0 (1978-00-00)
    14. ? 14.014.1 [Flora of China] (1994-00-00)

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