Viola walteri 'Silver Gem'

RHS Plant Profile
violet 'Silver Gem'

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A trailing, mat-forming evergreen to semi-evergreen perennial from the USA to around 10cm in height, with silver-green heart-shaped foliage and dark burgundy-red undersides. Small, blue to lavender purple flowers appear in the spring. An ideal variety for groundcover and for rock gardens

Position

Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
Up to 10 cm

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Partial shade
Aspect
South–facing or West–facing or East–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)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Violaceae
Native to GB/Ireland
No
Foliage
Evergreen, Semi evergreen
Habit
Matforming
Genus
Viola can be annuals, biennials or deciduous or evergreen perennials, with simple or pinnately lobed leaves and 5-petalled flowers of characteristic shape
Name Status
Accepted

How to Grow

Cultivation

Grow in fertile, humus-rich, moist but well-drained soil in partial shade

Propagation

Propagate by seed, or by division in spring or autumn

Suggested planting locations and garden types

  • Cottage and informal garden
  • Patio and container plants
  • Gravel garden
  • Rock garden
  • Flower borders and beds
  • Underplanting of roses and shrubs
  • Ground cover

Pruning

Deadhead to prolong flowering. After flowering cut back vigorous plants to keep compact

Pests

May be susceptible to slugs, snails, aphids, glasshouse red spider mite and violet gall midge

Diseases

May be susceptible to powdery mildews, pansy leaf spot, a virus and a rust