Oenothera macrocarpa subsp. incana 'Silver Blade'

Alpine Rockery Herbaceous Perennial

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An herbaceous perennial to 15cm in height, with trailing leafy stems to 30cm in length. Leaves are silvery-grey and narrowly oblong. The flowers are solitary, 8cm in width, bright yellow, appearing from late spring to early autumn

Position

Full sun

Soil Types

Sand, Loam, Chalk

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

Sand Loam Chalk

Moisture: Well–drained
pH: Neutral or Alkaline

Position

Full sun

Aspect: South–facing or East–facing
Exposure: Exposed or 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

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Onagraceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy, Trailing
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 poor to moderately fertile, well-drained soil in full sun; ideal for stony soil. Protect from excessive winter wet

Propagation

Propagate by division in early spring or take softwood cuttings of non-flowering shoots from late spring to midsummer

Suggested planting locations and garden types

Cottage and informal garden
City and courtyard gardens
Gravel garden
Mediterranean climate plants
Patio and container plants
Wildlife gardens
Low Maintenance
Flower borders and beds
Garden edging
Ground cover

Pruning

No pruning required

Pests

May be susceptible to damage by slugs

Diseases

Susceptible to leaf spots, mildews and root rot