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Cornell University

Species: Mahonia aquifolium

(Ma-hoe'ni-ah a-kwi-fo'lee-um)

Mahonia aquifolium

Oregon Grapeholly

Found on Course Walks

Broad-leaved Evergreens

Map of plant locations

(Plant location data may be incomplete)

In Collection(s):

None Listed

Ornamental Characteristics

Shrub 4 to 8 feet

3' - 6' (equal spread)

Evergreen

variable - mounded to upright

broadleaf evergreen; leaves emerge Bright green or bronzy orange turning to dark green in summer, bronze purple in fall; fragrant yellow flowers open in March; grape-like fruit ripen in summer. Occasional tan leaves due to winter damage in full sun.

Environmental Characteristics

Part shade

5b

Can tolerate acid to neutral soil (pH 5.0 to 7.4)

Prefers shade and shelter from winter sun and wind.

Consistently moist, well-drained soil; Occasional periods of dry soil
See graphic below

Insect Disease

relatively trouble free; possible problems caused by leaf rusts, leaf spots, leaf scorch, barberry aphid, scale, whitefly

Bare Root Transplanting


Other

native to Pacific Northwest from British Columbia to Oregon; transplant B & B or from container; treat as a groundcover in colder climates; popularized by Lewis and Clark

Native Range Map

Native Range Map Image

Moisture Tolerance Graphic

Please view this page on a tablet or larger screen for the moisture graph

Moisture Tolerance

Moisture graphic
Occasionally saturated or very wet soil
Consistently moist, well-drained soil
Occasional periods of dry soil
Prolonged periods of dry soil
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