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Oregon Grape Holly

Mahonia aquifolium

Oregon grape holly is an evergreen native shrub that brings year-round leaf cover to partially shaded planting areas. Its holly-like foliage forms a substantial backdrop for lower plants, while yellow flowers arrive from early to mid-spring and give way to blue berries. At about 5 feet tall, it works best where its broad, textured form can remain visible rather than being crowded behind taller shrubs.

  • Pollinator friendly
  • Deer resistant
  • Native to North America
Sunlight Partial Shade
Water Moderate
USDA zones 5–9
Spacing 4 ft
Mature size 5 ft tall, 4 ft wide
Bloom Early spring - mid spring

Placement and use

Use Oregon grape holly in the interior or back half of a shade border, along a woodland edge, or on a dry slope where an evergreen shrub can anchor the planting through winter. Set it back from narrow walks and entry routes so the spiny-looking foliage does not lean into circulation space. Its 4-foot width also makes it useful for connecting separate groups of shade-tolerant perennials into a continuous planted area.

Spacing and mature footprint

Space plants 4 feet apart, center to center, for a joined shrub planting with room for each plant to establish its own 4-foot-wide crown. In a single-specimen placement, reserve a footprint at least 4 feet across and keep nearby shrubs outside that space. Allow an access strip beside the planting bed for pruning, cleanup, and reaching the interior without stepping through lower companions.

Three plants set 4 ft apart, center to center; shaded circles show the 4 ft mature spread.

Sun, water, and soil

Place this shrub in partial shade, particularly where it can receive shelter from the hottest part of the day. Moderate water suits a bed with reasonably even moisture during establishment, while its use on dry slopes makes it a practical structural plant for shaded grades. Keep it out of sites that collect standing water, and plan irrigation separately from plants that need consistently wet soil.

Seasonal notes

Evergreen foliage holds the shrub’s place in the design through winter, so leave visual room for it even when surrounding perennials are dormant. Early- to mid-spring yellow flowers create a seasonal focal point before many shade borders fill in. Blue berries follow later, extending the plant’s presence beyond bloom and supporting a pollinator-friendly garden plan.

Planning caveats

Avoid exposed, wind-prone positions, where foliage can scorch or suffer frost damage. Oregon grape holly can spread outward by suckers, so give the edge of the planting bed a manageable boundary and remove unwanted shoots before they enter paths or neighboring plant spaces. If shaping is needed, avoid routine hard cutting that removes old growth carrying the next season’s flowers and fruit.[1][2]

Growing facts

Botanical name
Mahonia aquifolium
Type
Shrub
Category
Shrubs
Lifecycle
perennial
USDA hardiness zones
5–9
Sunlight
Partial Shade
Water
Moderate
Plant spacing
4 ft
Mature size
5 ft tall, 4 ft wide
Bloom season
Early spring - mid spring
Pollinator friendly
Yes
Deer resistant
Yes
Native to North America
Yes

References

  1. Oregon Grapeholly - Berberis aquifolium — North Carolina Extension Gardener Plant Toolbox
  2. How to grow mahonia — Royal Horticultural Society

Editorial content updated 2026-07-20.