Oenothera speciosa 'Siskiyou' variegated (v)

RHS Plant Profile
white evening primrose 'Siskiyou' variegated

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Synonyms

Oenothera speciosa 'Siskiyou Variegata'

Plants for pollinators
Herbaceous Perennial

A low, spreading perennial forming wide mats of lance-shaped, wavy-edged leaves up to 7cm long. Fragrant, cup-shaped pale pink to white flowers with a yellowish-green eye are produced from late spring into early summer and again from late summer into autumn if the plant is cut back after the first flush of flowers in midsummer

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
South–facing or West–facing or East–facing
Exposure
Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H5
Drought Resistance
Yes

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

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

Grow in an average to rich, well-drained soil in full sun or light shade. A vigorous spreader and can be difficult to eradicate once established so position carefully

Propagation

Propagate by division in spring or by softwood cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Gravel garden
  • Wildlife gardens
  • Rock garden
  • Flower borders and beds
  • Garden edging
  • Ground cover

Pruning

Cut back after flowering

Pests

May be susceptible to slugs

Diseases

Generally disease-free but may be susceptible to powdery mildews and a leaf spot and susceptible to root rot in heavy, wet soils