Epimedium grandiflorum 'Rubinkrone'

RHS Plant Profile

barrenwort 'Rubinkrone'

RHS

Herbaceous Perennial

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'Rubinkrone' is a clump-forming, rhizomatous perennial 25cm high, with deciduous, pinnate leaves, 30cm long, formed of usually nine ovate to heart-shaped, spiny-edged leaflets which open flushed with bronze and mature to light green, and flowers of plum purple sepals and rich pink petals, with white-tipped spurs, in spring; Epimedium leaves may be used for their nests by leaf-cutting bees

Position

Partial shade

Soil Types

Clay, 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

Clay Loam Sand

Moisture: Moist but well–drained
pH: Acid or Neutral

Position

Partial shade

Aspect: South–facing or West–facing or North–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

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Berberidaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Epimedium are rhizomatous perennials with evergreen or deciduous, ternately or pinnately divided leaves, and open sprays of small, bowl-shaped flowers, often with prominent spurs, in mid to late spring
Name Status: Accepted

How to Grow

Cultivation

Grow in fertile, humus-rich, moist but well-drained and preferably slightly acidic soil in partial shade, with shelter from cold, drying winds; where frosts are prolonged or severe, spread an organic mulch such as leaf mould or composted bark to protect plants over winter

Propagation

Propagate by division in autumn or after flowering; or by root cuttings of rhizomes, kept under glass in winter, and planted out after all danger of frost has passed

Suggested planting locations and garden types

Cottage and informal garden
City and courtyard gardens
Low Maintenance
Flower borders and beds
Ground cover
Underplanting of roses and shrubs
Banks and slopes

Pruning

No pruning required, but cutting back in late winter or early spring, before flower spikes form, will improve appearance

Pests

May be susceptible to vine weevil

Diseases

May be susceptible to mosaic virus diseases and fungal leaf spots