Viola biflora

RHS Plant Profile
twin-flowered violet

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twin-flowered violet visionspictures.com
twin-flowered violet visionspictures.com
Herbaceous Perennial Alpine Rockery
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A perennial alpine wildflower, to around 10cm high, with creeping rhizomes and kidney-shaped green leaves with scalloped edges. Small, bright yellow flowers, with purple-brown veining on the lower petals, are produced in late spring and summer

Position

Partial shade

Soil Types

Chalk, Clay, Loam

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

Position

Partial shade
Aspect
East–facing or North–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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Violaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
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
Correct
Plant Range
N Hemisphere

How to Grow

Cultivation

Thrives in moist soil in a sheltered position with protection from strong sunlight and cold, drying winds

Propagation

Propagate by seed

Suggested planting locations and garden types

  • Cottage and informal garden
  • Rock garden
  • Wildflower meadow
  • Low Maintenance
  • Banks and slopes

Pruning

No pruning required

Pests

May be susceptible to slugs, snails, aphids and violet leaf midges

Diseases

Generally disease-free, but may be susceptible to pansy leaf spot, powdery mildews, a rust and virus diseases