Astrantia major Sparkling Stars Series

RHS Plant Profile

masterwort 'Sparkling Stars'

RHS / Joanna Kossak

Herbaceous Perennial

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'Sparkling Stars' is a newer variety of Astrantia with reddish-pink flowers and lighter pink inner petals like pincushions. Flowers appear from mid to late summer and attract bees and butterflies.

Position

Full sun, 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 or Poorly–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

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

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Apiaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
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: Unresolved

How to Grow

Cultivation

Best grown in moist, fertile, humus-rich soil in sun or partial shade but will tolerate drier conditions

Propagation

Propagate by seed sown in pots in a cold frame as soon as seed is ripe or propagate by division in spring

Suggested planting locations and garden types

Cottage and informal garden
City and courtyard gardens
Gravel garden
Wildlife gardens
Flower borders and beds

Pruning

Deadhead before seed is ripe to prevent self-seeding

Pests

May be susceptible to Astrantia leaf miner

Diseases

May be susceptible to powdery mildews