• 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

Thymus 'Highdown'

thyme 'Highdown'

© RHS
  • Other common names thyme 'Highdown'

  • Family Lamiaceae

  • Genus Thymus are evergreen woody-based perennials, shrub or sub-shrubs with small aromatic leaves and terminal whorls of small, 2-lipped, tubular, purple, pink or white flowers in late spring or summer

  • Details 'Highdown' has upright bushy habit reaching about 25cm. The foliage is highly aromatic; pink-mauve flowers in summer

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • Fragrance Leaf

  • 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)

    H5

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Exposed or Sheltered

Soil

  • Loam

    Loam

  • Chalk

    Chalk

  • Sand

    Sand

  • MoistureWell-drained

  • SoilLoam, Chalk, Sand

  • pHAlkaline, Neutral

Size

  • 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 in most well-drained alkaline to neutral soils in full sun. Dislikes winter wet

Propagation Propagate by seed in containers in spring, though cultivars may not come true from seed, by softwood cuttings in early summer or semi-ripe cuttings in mid- to late summer

Suggested planting locations and garden types Drought Resistant Garden Edging Low Maintenance Cottage & Informal Garden Gravel Garden Patio & Container Plants Rock Garden Wildlife Gardens

How to care

Pruning Pruning group 10

Pests Generally pest free

Diseases Generally disease free

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