Mahonia aquifolium
Oregon Grape
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Oregon Grape (Mahonia aquifolium) - Description
M. aquifolium is native from the British Columbia to Northern California, mostly west of the Cascades. It is the state flower of Oregon. It bears leaves that are typically glossy green, 6 to 12 inches long, with five to nine leaflets. The leaves turn purplish or bronze in the winter, especially in cold-winter areas or where plants are grown in full sun. It also produces flowers that appear in 2 to 3 inch clusters along stems in early spring with edible blue-black fruit with gray bloom.
Oregon Grape (Mahonia aquifolium) - Blooming
Clusters or spikes of yellow flowers, often followed by colorful berries.
Oregon Grape (Mahonia aquifolium) - Growth
Evergreen shrubs with eye-catching, usually spiky foliage. Low-growing species work well as a groundcover. Mahonia grows best in partial-full shade. Tolerant of sun only if the soil does not dry out. M. fremontii and M. nevinii require full sun. Plants need shelter from cold, dry winds.
Oregon Grape (Mahonia aquifolium) - Planting
Site spiky varieties away from paths. Propagate from stratified seeds, semi-ripe cuttings in fall, or suckers.
Oregon Grape (Mahonia aquifolium) - Pest
Scale insects and whiteflies. Other problems include galls, rust, and leaf spots.
Oregon Grape (Mahonia aquifolium) - Interesting facts
Mahonia's berries are rich in Vitamin C, but with a sharp taste.
Oregon Grape (Mahonia aquifolium) - Soil and irrigation
Acidic and humus-rich soil, well aerated. If soil is dry, they need full shade.
