We have recently published ‘Food Forest Plants for Hotter Conditions’: i.e. tropical and sub-tropical regions. We rely on regular donations to keep our free database going and help fund development of this and another book we are planning on food forest plants for Mediterranean climates. Please give what you can to keep PFAF properly funded. More >>>

Follow Us:

 

Mahonia nervosa - (Pursh.)Nutt.

Common Name Oregon Grape, Cascade barberry
Family Berberidaceae
USDA hardiness 5-9
Known Hazards None known
Habitats Light dry woods and rocky ledges[60, 67].
Range North-western N. America.
Edibility Rating    (3 of 5)
Other Uses    (3 of 5)
Weed Potential No
Medicinal Rating    (2 of 5)
Care (info)
Fully Hardy Well drained soil Moist Soil Full shade Semi-shade Full sun
Mahonia nervosa Oregon Grape, Cascade barberry


Mahonia nervosa Oregon Grape, Cascade barberry

 

Translate this page:

Summary


Physical Characteristics

 icon of manicon of shrub
Mahonia nervosa is an evergreen Shrub growing to 0.6 m (2ft) by 1 m (3ft 3in) at a slow rate.
See above for USDA hardiness. It is hardy to UK zone 6. It is in leaf all year, in flower from February to April. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and can grow in heavy clay and nutritionally poor soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in full shade (deep woodland) semi-shade (light woodland) or no shade. It prefers dry or moist soil.

UK Hardiness Map US Hardiness Map

Synonyms

M. glumacea. Berberis glumacea. B. nervosa.

Plant Habitats

Woodland Garden Sunny Edge; Dappled Shade; Shady Edge; not Deep Shade; Ground Cover;

Edible Uses

Edible Parts: Fruit  Leaves
Edible Uses:

Fruit - raw or cooked[2, 3, 101]. An acid flavour but it is rather nice raw, especially when added to muesli or porridge[K]. Unfortunately, there is relatively little flesh and a lot of seeds[K]. Too acid for most tastes but they are very good in jams, jellies, pies etc[183]. They can also be used to enhance the flavour of bland fruits or made into a refreshing lemon-flavoured drink[183]. The fruit is about 8mm in diameter[200]. Young tender leaves - cooked. Simmered in a small amount of water and eaten as a snack[183].

References   More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
Antiarthritic  Antibacterial  Antitumor  Blood tonic  Dysentery  Laxative  Tonic

The root is alterative and tonic[4]. It improves the digestion and absorption and is recommended in the treatment of psoriasis, syphilis and impure blood conditions[4, 257]. A decoction of the peeled and chopped root bark has been used as a wash in treating arthritis and as an eyewash for red itchy eyes[257]. The fruit is an excellent safe and gentle laxative[257]. Berberine, universally present in rhizomes of Mahonia species, has marked antibacterial effects[218] and is used as a bitter tonic[213]. Since it is not appreciably absorbed by the body, it is used orally in the treatment of various enteric infections, especially bacterial dysentery[218]. It should not be used with Glycyrrhiza species (Liquorice) because this nullifies the effects of the berberine[218]. Berberine has also shown antitumour activity[218]. The root and root bark are best harvested in the autumn[213].

References   More on Medicinal Uses

The Bookshop: Edible Plant Books

Our Latest books on Perennial Plants For Food Forests and Permaculture Gardens in paperback or digital formats.

Food Forest Plants for Hotter Conditions: 250+ Plants For Tropical Food Forests & Permaculture Gardens.
Edible Tropical Plants

Food Forest Plants for Hotter Conditions: 250+ Plants For Tropical Food Forests & Permaculture Gardens.

More
Plants for Your Food Forest: 500 Plants for Temperate Food Forests & Permaculture Gardens.
Edible Temperate Plants

Plants for Your Food Forest: 500 Plants for Temperate Food Forests & Permaculture Gardens.

More
PFAF have eight books available in paperback and digital media.
More Books

PFAF have eight books available in paperback and digital formats. Browse the shop for more information.

Shop Now

Other Uses

Dye

A yellow dye is obtained from the inner bark of the stem and roots[98, 101, 257]. Dark green, violet and dark blue-purple dyes are obtained from the fruit[168]. A green dye is obtained from the leaves[168]. Plants can be grown as a ground cover, spaced about 30cm apart each way[208]. They are very slow to spread[208] and so will need weeding for their first few years after planting[K].

Special Uses

Food Forest  Ground cover

References   More on Other Uses

Cultivation details

An easily grown plant, it thrives in any good garden soil[11, 200] but also succeeds in poor dry ones. Another report says that it is best on a lime-free soil[182]. Grows well in heavy clay soils. Prefers a sunny position[3] but succeeds in heavy woodland shade[K]. Hybridizes freely with other members of this genus. Plants are growing and fruiting well at Wakehurst Place in Sussex, but they do not generally do well in Britain[11]. Resistant to honey fungus[88].

References   Carbon Farming Information and Carbon Sequestration Information

Temperature Converter

Type a value in the Celsius field to convert the value to Fahrenheit:

Fahrenheit:

image

The PFAF Bookshop

Plants For A Future have a number of books available in paperback and digital form. Book titles include Edible Plants, Edible Perennials, Edible Trees,Edible Shrubs, Woodland Gardening, and Temperate Food Forest Plants. Our new book is Food Forest Plants For Hotter Conditions (Tropical and Sub-Tropical).

Shop Now

Plant Propagation

Seed - best sown as soon as it is ripe in a cold frame[78]. It usually germinates in the spring[K]. 'Green' seed (harvested when the embryo has fully developed but before the seed case has dried) should be sown as soon as it is harvested and germinates within 6 weeks[K]. Stored seed should be sown as soon as possible in late winter or spring. 3 weeks cold stratification will improve its germination, which should take place in 3 - 6 months at 10°c. Prick out the seedlings when they are large enough to handle and grow them on in a cold frame for at least their first winter. Plant them out in late spring or early summer. Division of suckers in spring[78]. Whilst they can be placed direct into their permanent positions, better results are achieved if they are potted up and placed in a frame until established[11]. Leaf cuttings in the autumn.

Other Names

If available other names are mentioned here

Native Range

NORTHERN AMERICA: Canada (British Columbia (southwest)), United States (Idaho (north), Oregon (west), Washington (west), California (northwest))

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther
Mahonia aquifoliumOregon Grape, Hollyleaved barberry, Oregon Holly Grape, Oregon HollyShrub2.0 4-8 FLMHFSNDM333
Mahonia bealeiBeale's barberry, Leatherleaf MahoniaShrub2.0 5-8 SLMHFSNM320
Mahonia confusa Shrub1.5 6-9  LMHFSM32 
Mahonia flavida Shrub2.0 7-10  LMHFSNM20 
Mahonia fortuneiFortune's MahoniaShrub2.0 7-9 SLMHFSNM32 
Mahonia fremontiiMahonia, Fremont's mahoniaShrub2.5 7-10 SLMHNDM322
Mahonia ganpinensis Shrub0.0 -  LMHSNM12 
Mahonia gracilipes Shrub1.5 6-9  LMHFSM22 
Mahonia gracilisMexican BarberryShrub1.5 7-10  LMHNDM20 
Mahonia haematocarpaMexican Barberry, Red barberryShrub3.6 7-10  LMHNDM322
Mahonia japonica Shrub2.0 5-9  LMHFSNM32 
Mahonia lomariifoliaChinese hollygrapeShrub5.0 8-9 MLMHSNM320
Mahonia napaulensis Shrub2.5 5-9  LMHSNM321
Mahonia neviniiNevin's barberryShrub2.4 7-10  LMHNDM322
Mahonia pinnataCalifornia Barberry, Wavyleaf barberry, Island barberry, Creeping Holly GrapeShrub1.8 7-8 FLMHSNM322
Mahonia pumilaDwarf BarberryShrub0.3 6-9 SLMSNDM323
Mahonia repensCreeping Oregon Grape, Creeping barberry, Grape OregonShrub0.3 4-8 SLMHSNDM334
Mahonia swaseyiTexas Mahonia, Texas barberryShrub2.5 7-10  LMHNDM32 
Mahonia trifoliolataMexican Barberry, AlgeritaShrub2.0 6-9  LMHNDM324
Mahonia x media Shrub2.0 6-9  LMHFSNM320

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

Expert comment

Author

(Pursh.)Nutt.

Botanical References

1160200

Links / References

For a list of references used on this page please go here

Readers comment

Add a comment

If you have important information about this plant that may help other users please add a comment or link below. Only comments or links that are felt to be directly relevant to a plant will be included. If you think a comment/link or information contained on this page is inaccurate or misleading we would welcome your feedback at [email protected]. If you have questions about a plant please use the Forum on this website as we do not have the resources to answer questions ourselves.

* Please note: the comments by website users are not necessarily those held by PFAF and may give misleading or inaccurate information.

To leave a comment please Register or login here All comments need to be approved so will not appear immediately.

Subject : Mahonia nervosa  
© 2010, Plants For A Future. Plants For A Future is a charitable company limited by guarantee, registered in England and Wales. Charity No. 1057719, Company No. 3204567.