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B and T World Seeds' reference number:
The average, annual, minimum temperature zone where Mahonia nervosa is cold hardy
USDA Zone:6 -10° to 0°F (-23.5° to -18°C)
|Type of plant - shrub
Flower or inflorescence:
in 20 cm. racemes
BLACK, to 8mm. dia.
|Height, in meters: 1
Height, in feet: 3.30
|Mahonia nervosa sales history
| Parts of Mahonia nervosa are considered toxic.
Common names for Mahonia nervosa:
|Cascades Mahonia, Long-leaved Oregon Grape, Low Oregon Grape, Water Holly,|
is included in the following
B and T World Seeds flowering plant categories.
|40||: Shrub Seed List, Hardy and Tender|
|76||: Californian Native Plant Seed List|
|88||: Natives of U.S.North West|
|94||: Natives of Rocky Mountain Area U.S.A.|
|719||: North American Native Ethnobotanicals|
|Including medicinal, dye, fiber, food, construction, ritual|
Some knowledge about growing from seed is necessary to germinate even the easiest seeds.
Most seeds require humidity to germinate, even desert plants like
require that their growing medium remains moist until germination.|
Most seeds require oxygen to germinate, if buried too deep in their growing medium, or if the medium is too wet,
the seeds may not get the oxygen they require.
Mahonia nervosa seeds will usually germinate in 90-120 days, even under good conditions germination may be erratic.
Mahonia nervosa seeds need to be "overwintered" before they will germinate.
Stratification; cold treatment or vernalization. Seeds of some species need just a couple of weeks, others 3 months. Seeds can be stratified in dampened peat or sand, in a plastic box or bag at 4°C or 5°C in a refrigerator. The seeds should not be frozen or in a wet medium. Very small seeds can be sown on the surface of their growing medium, in pots sealed in plastic bags, and kept in the 'fridge. Many vernalized seeds need light to germinate when they are sown in the "Spring".
(Pre-chill for 3 weeks)