• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Polygala calcarea 'Lillet'

milkwort 'Lillet'

AGM plants

AGM plants have been through a rigorous trial and assessment programme. They are:

  • Excellent for ordinary use in appropriate conditions
  • Available to buy
  • Of good constitution
  • Essentially stable in form & colour
  • Reasonably resistant to pests & diseases
milkwort 'Lillet'

© RHS

  • Other common names milkwort 'Lillet'

  • Family Polygalaceae

  • Genus Polygala can be annuals, evergreen perennials or shrubs, with simple leaves and racemes of somewhat pea-shaped flowers

  • Details 'Lillet' is a compact mat-forming evergreen perennial to 5cm in height, with small, leathery dark green leaves and short terminal racemes of white-tipped, bright blue flowers 7mm in length from late spring to summer

Characteristics

  • Foliage Evergreen

  • Habit Mat forming

  • 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

Sunlight

  • Full Sun

  • Partial Shade

  • Aspect South-facing or East-facing

  • Exposure Sheltered

Soil

  • Chalk

    Chalk

  • Loam

    Loam

  • Sand

    Sand

  • MoistureWell-drained

  • SoilChalk, Loam, Sand

  • pHAlkaline, Neutral, Acid

Size

  • Ultimate height Up to 10 cm

  • Ultimate spread 0-0.1 metre

  • Time to ultimate height 2-5 years

How to grow

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

Propagation Propagate by seed sown in pots in an open frame in autumn. Propagate by taking softwood or semi-hardwood cuttings in mid to late summer

Suggested planting locations and garden types Gravel Garden Patio & Container Plants Rock Garden

How to care

Pruning No pruning required

Pests Generally pest free

Diseases Generally disease free

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