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Herbaceous Perennial

Oenothera speciosa 'Siskiyou' variegated (v)

white evening primrose 'Siskiyou' variegated

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

Synonyms

Oenothera speciosa 'Siskiyou Variegata'

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Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Loam

Sand

Moisture

Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

South–facing or West–facing or East–facing

Exposure

Sheltered

Drought resistance

Yes

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)

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

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