• AGM plants

    AGM plants have been through a rigourous 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

Phlomis fruticosa

Jerusalem sage

AGM plants

AGM plants have been through a rigourous 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
Jerusalem sage

© � RHS 2002

  • Other common names Jerusalem sage
    Jupiter's distaff

    Yellow clary

    see more
  • Genus Phlomis can be herbaceous perennials or evergreen shrubs, with sage-like leaves and whorls of tubular, hooded flowers over a long period in summer

  • Family Lamiaceae / Lamiaceae

  • Species P. fruticosa is a small spreading evergreen shrub, the erect shoots bearing sage-like, grey-green ovate leaves to 12cm in length. Flowers 3cm in length, hooded, deep yellow, in whorls in the upper leaf axils from early summer

  • Plant range Mediterranean

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • 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)
    Old hardiness ratings

    While we update our systems with the new hardiness ratings you may still see old hardiness ratings in your search results. These are denoted as 'Old'.

    • H1 - Requires heated glass
    • H2 - Requires unheated glass
    • H3 - Hardy outside in some regions of the UK
    • H4 - Hardy throughout the UK
    • H1 + H3 - Requires heated glass but may be grown outside in summer

    For full details of the hardiness ratings see

    see more

    H4

Colour

Sunlight

  • Full Sun

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

  • Exposure Sheltered

Soil

  • Chalk

    Chalk

  • Chalk

    Loam

  • Chalk

    Sand

  • MoistureWell-drained, Moist but well-drained

  • SoilChalk, Loam, Sand

  • pHAcid, Neutral, Alkaline

Size

  • Ultimate height

    0.5-1 metres

  • Ultimate spread

    1-1.5 metres

  • Time to ultimate height

    5-10 years

How to grow

Cultivation Easy to grow in any well-drained fertile soil in full sun. Seed heads can be left over winter for their effect

Propagation Propagate by softwood cuttings in summer or division in the spring. Propagate by seed in late spring under cover

Suggested planting locations and garden types Drought Resistant Low Maintenance Flower borders and beds Mediterranean Climate Plants Cottage & Informal Garden Coastal

How to care

Pruning Pruning group 8 or pruning group 9

Pests Leafhoppers may be a problem

Diseases Generally disease free

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