Chamaebuxus unguiculata 'Loibl'

RHS Plant Profile
box-leaved milkwort 'Loibl'

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Synonyms

Chamaebuxus alpestris 'Loibl', Polygala chamaebuxus 'Loibl', Polygaloides chamaebuxus 'Loibl'

Alpine Rockery Shrubs

A dwarf spreading evergreen shrub to 15cm tall, with small, narrowly lance-shaped, dark green leaves and vivid purple flowers with yellow-tipped keel petals in late spring and early summer

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

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

Position

Full sun Partial shade
Aspect
South–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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Apiaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Genus
A genus of six species of small shrubs or subshrubs; five from the Mediterranean and Central Europe and one from eastern North America. They have small, leathery leaves and fragrant, pea-like white, pink or purple flowers
Name Status
Accepted

How to Grow

Cultivation

Grow in moderately fertile, humus-rich, sharpley-drained soil in full sun or partial shade. Can also be grown in an alpine house

Propagation

Propagate by seed sown in an open cold frame in autumn. Propagate by softwood cuttings in early summer, or semi-ripe cuttings in mid to late summer

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • Rock garden
  • Flower borders and beds
  • Garden edging

Pruning

No pruning required

Pests

aphids and glasshouse whitefly may be a problem under glass

Diseases

Disease free