Astrantia 'Warren Hills'

RHS Plant Profile

masterwort 'Warren Hills'

RHS / Joanna Kossak

Herbaceous Perennial

Buy this from Plant Nurseries
2 Suppliers

A clump-forming, herbaceous perennial, up to 75cm high, with five-lobed, toothed, green leaves, and umbels of pale pink flowers surrounded by paler pink bracts, tipped and netted with green, in summer

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

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 Sand

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

Position

Full sun Partial shade

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

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Apiaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Astrantia are clump-forming herbaceous perennials with palmately lobed basal leaves and branched, erect, wiry stems bearing compact umbels of tiny flowers surrounded by a rosette of showy bracts
Name Status: Accepted

How to Grow

Cultivation

Grow in moisture-retentive but well-drained, preferably humus-rich, fertile soil in sun or partial shade

Propagation

Propagate by division in spring

Suggested planting locations and garden types

City and courtyard gardens
Wildlife gardens
Cottage and informal garden
Low Maintenance
Cut flowers
Ground cover
Flower borders and beds

Pruning

No pruning required, but dead-head to encourage repeat flowering and, if seedlings are not wanted, dead-head before seed is ripe

Pests

May be susceptible to astrantia leaf miner

Diseases

May be susceptible to powdery mildews