Mahonia × wagneri 'Undulata'
Oregon grape 'Undulata'
An erect evergreen shrub to about 2m tall, with pinnate leaves composed of spiny-edged, glossy leaves turning red-purple in winter, and bright yellow flowers in short, clustered racemes in spring, followed by blue-black fruits
Size
Ultimate height
1.5–2.5 metresTime to ultimate height
5–10 yearsUltimate spread
1.5–2.5 metresGrowing conditions
Moisture
Moist but well–drained, Well–drainedpH
Acid, Alkaline, NeutralColour & scent
Stem | Flower | Foliage | Fruit | |
Spring | Yellow | Green | ||
---|---|---|---|---|
Summer | Green | Black Blue | ||
Autumn | Green | Blue Black | ||
Winter | Purple |
Position
- Full shade
- Partial shade
- Full sun
Aspect
South–facing or North–facing or West–facing or East–facing
Exposure
Sheltered Hardiness
H5Botanical details
- Family
- Berberidaceae
- Native to GB / Ireland
- No
- Foliage
- Evergreen
- Habit
- Bushy, Spreading branched
- Potentially harmful
- Berries are ornamental, not to be eaten. Wear gloves and other protective equipment when handling
- Genus
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
Accepted
How to grow
Cultivation
Grow in humus-rich moist but well-drained soil, suited to full or partial shade in a sheltered position but tolerant of sun if soil is not too dry. See mahonia cultivation for further information
Propagation
Propagate by semi-ripe cuttings
Suggested planting locations and garden types
- Architectural
- Coastal
- Cottage and informal garden
- Wildlife gardens
- City and courtyard gardens
- Low Maintenance
Pruning
Pests
Generally pest-free
Diseases
Generally disease-free
Love gardening
Sign up to receive regular gardening tips, inspiration, offers and more
View our Privacy Policy
Get involved
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.