Phlomis purpurea

RHS Plant Profile
purple Jerusalem sage

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A bushy, evergreen shrub with woolly shoots and lance-shaped, hairy, grey-green leaves up to 10cm long. Widely-spaced whorls of hooded flowers, pale purple to pink or occasionally white, appear on upright stems in summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Growing Conditions

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

Position

Full sun
Aspect
South–facing or West–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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Lamiaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
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
Name Status
Correct
Plant Range
W. Med.

How to Grow

Cultivation

Grow in fertile, well-drained soil in full sun

Propagation

Propagate by division in spring, or propagate by seed sown at 13-18°C in spring

Suggested planting locations and garden types

  • Cottage and informal garden
  • Mediterranean climate plants
  • Flower borders and beds

Pruning

Pruning group 8 or pruning group 9

Pests

May be susceptible to leafhoppers

Diseases

May be susceptible to honey fungus (rarely)