Alyssum 'Snow Crystals'

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Annual Biennial Bedding

A compact, mound-forming perennial, often grown as a summer annual, reaching 15cm in height. In summer it bears a profusion of tiny, cross-shaped, scented white flowers in rounded clusters. A good plant for coastal gardens, rockeries or containers

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Chalk Clay Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
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)
H3

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Brassicaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Matforming
Genus
Alyssum can be annuals or evergreen perennials or sub-shrubs, with simple leaves and short racemes of small, 4-petalled yellow or white flowers in early summer
Name Status
Unresolved

How to Grow

Cultivation

Grow in light, moderately fertile, well-drained soil in full sun

Propagation

Propagate by sowing seed under glass in early spring, or in situ in late spring

Suggested planting locations and garden types

  • Coastal
  • Cottage and informal garden
  • Patio and container plants
  • Rock garden
  • Bedding
  • Garden edging

Pruning

Clip over after the first flush of blooms to promote further flowering

Pests

May be susceptible to slugs and flea beetles

Diseases

May be susceptible to downy mildews, club root and white blister