Not the plant you're looking for? Search over 300,000 plants
Herbaceous PerennialSynonym

Oenothera pallida 'Siskiyou'
  • RHS Plants for pollinators

white evening primrose 'Siskiyou'

A low-growing, spreading perennial to around 50cm tall forming dense mats covered with lance-shaped, toothed leaves. Fragrant, saucer-shaped, dark-veined, dark pink flowers are borne from summer into autumn

Synonyms
Oenothera berlandieri 'Siskiyou'
Oenothera pallida 'Siskiyou'
see moreOenothera rosea 'Siskiyou'
Oenothera 'Siskiyou'
Oenothera 'Siskiyou Pink'
Buy this plant
Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Pink Green
Autumn Pink Green
Winter
Position
  • Full sun
Aspect

South–facing or East–facing or West–facing

Exposure
Exposed or Sheltered
Drought resistance
Yes
Hardiness
H5
Botanical details
Family
Onagraceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Matforming
Genus

Oenothera can be annuals, biennials or perennials, upright or spreading in habit, with simple or lobed leaves and bowl-shaped, white, yellow or pink flowers over a long period in summer

Name status

Accepted

How to grow

Cultivation

Grows well in average to rich, well-drained soil in full sun or light shade

Propagation

Propagate by division in early spring, or by softwood cuttings of unflowered shoots from late spring to midsummer

Suggested planting locations and garden types
  • Cottage and informal garden
  • Gravel garden
  • Prairie planting
  • Coastal
  • Wildlife gardens
  • Ground cover
Pruning

No pruning required but can be cut back after flowering to encourage new growth and flowers

Pests

May be susceptible to slugs and aphids

Diseases

May be susceptible to leaf spot, powdery mildews and downy mildews; root rot may be a problem in rich, wet, heavy soil but generally disease-free

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.