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Longleaf Mahonia Cascade Mahonia

Mahonia nervosa

Berberidaceae · broadleaf · native

You spot Longleaf Mahonia as a low 1-2 foot groundcover displaying prominent veins on long compound leaves that cluster at stem tips. The erect elongated clusters of small yellow flowers appear in spring, followed by waxy blue berries. This native spreads slowly by rhizomes to form colonies in the forest understory throughout the Pacific Northwest.

Plant Longleaf Mahonia in partial shade with well-drained soil and low to moderate moisture. This slow-growing groundcover requires minimal maintenance. The root system allows full recovery after renovation pruning. Winter foliage can turn purple, adding seasonal color. Use as an understory planting or for slope stabilization. Superior hardiness and extreme adaptability make this an excellent choice for difficult shaded sites.

Quick Facts

Height
2 ft
Growth Rate
Slow
Light
Part Shade
Soil
Well Drained
Water
Low
Hardiness
Zone Zones 5a–8b
Bloom Time
Apr 1-Apr 30
Origin
Pacific Northwest native

Phenological Calendar

Stage Typical Window
New growth flush BBCH 11 Feb 15-Mar 15
Bloom start BBCH 61 Apr 1-Apr 30
Bloom end / petal fall BBCH 69 Apr 15-May 15
Fruit/seed development BBCH 71 Mar 15-May 31
Fruit/seed maturity BBCH 85 Jun 1-Aug 31

Diseases (2)

Pests (3)