Leucanthemum × superbum 'Alaska'

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Herbaceous Perennial
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A clump-forming herbaceous perennial with dark green, toothed, lance shaped leaves. Bright white, single flowers with dark yellow centres, flowering for a long period in the summer if dead-headed regularly; may need staking

Position

Full sun

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 Well–drained
pH
Neutral or Alkaline or Acid

Position

Full sun
Aspect
East–facing or South–facing or West–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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Leucanthemum are robust herbaceous perennials with narrowly oblong leaves and daisy-like flower-heads with white rays
Name Status
Accepted

How to Grow

Cultivation

Position in full sun, in moist but well-drained moderately fertile soil.

Propagation

Propagate by division in early spring or late autumn.

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Gravel garden
  • Wildlife gardens
  • Cut flowers
  • Flower borders and beds

Pruning

Dead head regularly, cut stems to ground level when flowering has finished.

Pests

May be susceptible to aphids and chrysanthemum eelworm

Diseases

Generally disease-free.