Polygala 'Purple Passion'

RHS Plant Profile
milkwort 'Purple Passion'

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Alpine Rockery
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A dwarf, evergreen, alpine shrub with a tufted habit and mid-green leaves. Purple and yellow pea shaped flowers are produced in the spring and summer.

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0-0.1 metre

Size

Time to Maturity
2–5 years
Max Spread
0-0.1 metre
Max Height
Up to 10 cm

Growing Conditions

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

Position

Full sun Partial shade
Aspect
East–facing or 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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Polygalaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Matforming, Tufted
Genus
Polygala can be annuals, evergreen perennials or shrubs, with simple leaves and racemes of somewhat pea-shaped flowers
Name Status
Accepted

How to Grow

Cultivation

Grow in moderately, fertile humus-rich, sharply drained soil, in full sun or partial shade

Propagation

Propagate by softwood cuttings in early summer or semi-ripe cuttings in mid to late summer

Suggested planting locations and garden types

  • Gravel garden
  • Patio and container plants
  • Rock garden
  • Low Maintenance
  • Garden edging

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free