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Shrubs

Mahonia oiwakensis subsp. lomariifolia
  • RHS AGM
  • RHS Plants for pollinators

lomaria-leaved mahonia

M. oiwakensis subsp. lomariifolia is an erect large evergreen shrub to 3-4m, with long, pinnate leaves with spiny leaflets. Flowers bright yellow, slightly scented, in dense, erect, clustered racemes to 25cm in length from late autumn into winter, followed by blue-black berries

Synonyms
Mahonia lomariifolia
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© RHS 2002
© RHS
© RHS
© RHS 2002
© RHS
© RHS
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Size
Ultimate height
2.5–4 metres
Time to ultimate height
10–20 years
Ultimate spread
1.5–2.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Green
Autumn Green
Winter Yellow Green Black Blue
Position
  • Full shade
  • Partial shade
Aspect

South–facing or North–facing or West–facing or East–facing

Exposure
Sheltered
Hardiness
H4
Botanical details
Family
Berberidaceae
Native to the UK
No
Foliage
Evergreen
Habit
Bushy
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
SW China, Myanmar

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How to grow

Cultivation

Grows well in moderately fertile, humus-rich soil. Will tolerate full sun if the soil is not too dry. Provide shelter from cold, drying winds. See mahonia cultivation

Propagation

Propagate by seed sown in containers in autumn or as soon as ripe. Stratified seeds germinate freely. Root semi-ripe cuttings in late summer or autumn

Suggested planting locations and garden types
  • Cottage and informal garden
  • Wildlife gardens
  • Low Maintenance
  • Flower borders and beds
Pruning

Pruning group 8

Pests

Generally pest-free

Diseases

Generally disease-free

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