• 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

Prunella vulgaris


  • Other common names selfheal
    self heal

    blue curls
    blue Lucy
    caravaun bog
    carpenter grass
    carpenter's herb
    carpenter's square
    heart of the earth
    herb carpenter
    Hercules' all-heal
    proud carpenter
    square stem
    thimble flower

    see more
  • Synonyms Prunella incisa

  • Family Lamiaceae

  • Genus Prunella are semi-evergreen perennials of spreading habit, the prostrate stems rooting at the nodes, with dense, short spikes of small, 2-lipped flowers

  • Details P. vulgaris is a creeping perennial to 30cm, with rooting stems bearing oblong or ovate leaves and short erect spikes of deep violet, rarely pink or white, tubular flowers in summer and early autumn

  • Plant range N Hemisphere


  • Foliage Semi-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)




  • Full Sun

  • Partial Shade

  • Aspect South-facing or North-facing or West-facing or East-facing

  • Exposure Exposed or Sheltered


  • Chalk


  • Clay


  • Loam


  • Sand


  • MoistureMoist but well-drained, Poorly-drained, Well-drained

  • SoilChalk, Clay, Loam, Sand

  • pHAcid, Alkaline, Neutral


  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Easy to grow plant for any soil in full sun or partial shade. May be considered invasive. Attract bees and other beneficial insects. Good ground cover

Propagation Propagate by seed or division

Suggested planting locations and garden types Banks and Slopes Ground Cover Flower borders and beds Underplanting of Roses and Shrubs Cottage & Informal Garden Wildlife Gardens

How to care

Pruning Deadhead to prevent self-seeding

Pests Generally pest free

Diseases Generally disease free

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