Mahonia aquifolium
Oregon Grapeholly

 Plant Type:
 Growth Forms:
 Hardiness:
 Deciduous / Evergreen:
 Flower Notes:
Yellow (Bright yellow flowers in 2-3" long terminal racemes in April)
 Foliage Notes:
Green (Evergreen foliage is spine-toothed, lustrous or dull, dark or bluish-green in spring/summer); Red-Violet (Purplish-red-green in fall/winter)
 Fruit Notes:
Blue (Glaucous blue fruits (0.3-0.5" dia.) persistent until December)
 Ultimate Height:
3-6 feet
 Ultimate Spread:
3-5 feet
 Soil Notes:
Widely adapted to different soils, except those with a high pH (chlorosis)
 Range:
British Columbia to Oregon
 Diagnostic Characteristics:
Thickish evergreen leaves (6-12" long) are opposite, pinnately compound (5-9 sessile leaflets 1.5-3.5" long), with spiny-dentate margins. Stems are grayish-brown at maturity. Leaf scars are narrow and half encircle the stem.

Additional Information

Widely adapted to soil type and environment, except high pH soils that will cause chlorosis. Quite susceptible to winter-burn. Do not plant in sites exposed to strong winds or afternoon sun in winter. Can get leggy with age. Fruits are edible and can be used in jellies.

When Mahonia aquifolium has been observed flowering or fruiting at Purdue University

Flowering

JanFebMarAprMayJunJulAugSepOctNovDec

Fruiting

JanFebMarAprMayJunJulAugSepOctNovDec

1 Mahonia aquifolium found

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= Heritage plant = Memorial plant
Number Accession ID Location
12009_08670*AKNOY

Other plants like this Mahonia aquifolium (Oregon Grapeholly)

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