Mahonia hartwegii
Hartweg Oregon grape
A relatively new mahonia to the UK, this species is from Mexico and is a striking plant. It grows to about 3m high with the leaves growing to about 60cm long, with huge panicles, up to 90cm long, of cream and pale yellow flowers in spring
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Size
Ultimate height
2.5–4 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 | Cream Yellow | Green | ||
|---|---|---|---|---|
| Summer | Green | |||
| Autumn | Green | Black Blue Purple | ||
| Winter | Green |
Position
- Full shade
- Partial shade
Aspect
East–facing or North–facing or South–facing or West–facing
Exposure
Sheltered Hardiness
H5Botanical details
- Family
- Berberidaceae
- Native to GB / Ireland
- No
- Foliage
- Evergreen
- Habit
- Bushy, Columnar upright
- 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
Correct
- Plant range
- NE Mexico
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 seed or semi-ripe cuttings
Suggested planting locations and garden types
- Architectural
- City and courtyard gardens
- Coastal
- Cottage and informal garden
- Wildlife gardens
- Low Maintenance
- Flower borders and beds
Pruning
Prune every other year to encourage bushy growth - pruning group 8.
Pests
Generally pest-free
Diseases
Generally disease-free
Get involved
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