Mahonia × wagneri 'Undulata'
Oregon grape 'Undulata'
'Undulata' is an erect evergreen shrub with pinnate leaves composed of spiny-edged, glossy leaves turning purple in winter, and bright yellow flowers in short, clustered racemes in spring
Ultimate height1.5–2.5 metres
Time to ultimate height10–20 years
Ultimate spread1.5–2.5 metres
MoistureMoist but well–drained, Well–drained
pHAcid, Alkaline, Neutral
Colour & scent
- Full shade
- Partial shade
South–facing or North–facing or West–facing or East–facing
ExposureExposed or Sheltered
- Native to the UK
Mahonia are evergreen shrubs with leathery, pinnate leaves which are often spine-toothed, and clustered racemes of sometimes fragrant yellow flowers, sometimes followed by black or purple berries
- Name status
How to grow
Grow in any well-drained or moist but well-drained soil in shade or partial shade. Good for a woodland setting
Suggested planting locations and garden types
- Wildlife gardens
- Low Maintenance
- Banks and slopes
Generally pest free
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.