Mahonia aquifolium
Oregon Grapeholly

 Plant Type:
 Deciduous / Evergreen:
Yellow (Bright yellow flowers in 2-3" long terminal racemes in April)
Green (Evergreen foliage is spine-toothed, lustrous or dull, dark or bluish-green in spring/summer); Red-Violet (Purplish-red-green in fall/winter)
Blue (Glaucous blue fruits (0.3-0.5" dia.) persistent until December)
 Ultimate Height:
3-6 feet
 Ultimate Spread:
3-5 feet
Widely adapted to different soils, except those with a high pH (chlorosis)
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





1 Mahonia aquifolium found

Building Map...

= Heritage plant = Memorial plant
Number Accession ID Location

The Purdue Arboretum is a collaboration between the Department of Horticulture and Landscape Architecture and Physical Facilities Grounds Department

Purdue Arboretum, 625 Agriculture Mall Dr, West Lafayette, IN, 47907
© 2024 Purdue University | An equal access/equal opportunity university | Integrity Statement | Copyright Complaints | Maintained by the Purdue Arboretum
Contact Purdue Arboretum at for accessibility issues with this page | Accessibility Resources | Contact Us