Epimedium franchetii 'Brimstone Butterfly'

RHS Plant Profile
barrenwort 'Brimstone Butterfly'
Award of Garden Merit
Herbaceous Perennial

A clump-forming, rhizomatous perennial 45-60cm high, with pinnate leaves, evergreen in mild winters, semi-evergreen in cold winters, formed of three long, narrowly ovate, spiny-edged and sharply tipped leaflets, which emerge tinged with pink and mature to mid-green, and branched spikes up to 45cm long of spidery flowers, of pale yellow sepals and long-spurred, greenish yellow petals, from early spring to early summer; Epimedium leaves may be used for their nests by leaf-cutting bees

Position

Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Partial shade
Aspect
West–facing or East–facing or South–facing or North–facing
Exposure
Sheltered
Hardiness
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Berberidaceae
Native to GB/Ireland
No
Foliage
Semi evergreen
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 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

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

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