Helleborus foetidus 'Yellow Wilgenbroek'

RHS Plant Profile

stinking hellebore 'Yellow Wilgenbroek'

RHS

Herbaceous Perennial

An evergreen perennial to 60cm with erect stems and palmately-divided leaves with narrow leaflets, yellow-green at first, maturing to bright green. Nodding, bell-shaped, yellow-green flowers are produced in large, open clusters from mid-winter to mid-spring

Position

Full shade, Full sun, Partial shade

Soil Types

Chalk, Clay, Loam

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Chalk Clay Loam

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

Position

Full shade Full sun Partial shade

Aspect: South–facing or West–facing or East–facing or North–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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Ranunculaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Potentially harmful: Harmful if eatenskin irritant. Wear gloves and other protective equipment when handling. Pets: Harmful if eatenskin irritant. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Helleborus can be rhizomatous, herbaceous or semi-evergreen perennials forming a clump of pedate basal leaves, or evergreen with erect, leafy stems. Large, bowl-shaped flowers are borne in loose clusters in late winter or spring
Name Status: Accepted

How to Grow

Cultivation

Thrives in neutral to alkaline soils that are moist, fertile and humus-rich. Partial shade is ideal but can tolerate full sun or full shade. Provide shelter from strong, cold winds. Mulch annually in autumn

Propagation

Propagate by seed sown in pots in a cold frame as soon as seed is ripe

Suggested planting locations and garden types

Cottage and informal garden
City and courtyard gardens
Wildlife gardens
Low Maintenance
Flower borders and beds

Pruning

Remove faded or damaged foliage as the flowers appear

Pests

May be susceptible to hellebore aphid, hellebore leaf miner and snails

Diseases

May be susceptible to hellebore black death, hellebore leaf spot and a virus