Viola stojanowii

RHS Plant Profile
Stojanov viola

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Stojanov viola RHS / Joanna Kossak

Synonyms

Viola stojanovii

Herbaceous Perennial

an evergreen perennial to 10cm tall with narrow, dark green leaves that form a low dome. Bright yellow flowers to 1.2cm wide and with a short, curved spur are borne on erect stems in summer; the upper petals may have a violet-blue tinge

Position

Full sun, Partial shade

Soil Types

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

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

Position

Full sun Partial shade
Aspect
South–facing or East–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)
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Violaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
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
SE Europe

How to Grow

Cultivation

Grow in a moderately fertile, moist but well-drained soil in full sun or partial shade and keep dry in winter

Propagation

Propagate by seed

Suggested planting locations and garden types

  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • Rock garden
  • Flower borders and beds
  • Garden edging

Pruning

No pruning required; deadhead to prolong flowering unless seed is required

Pests

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

Diseases

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