Calamintha grandiflora

RHS Plant Profile
greater calamint

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Other common names

calamint, large-flowered calamint

Synonyms

Clinopodium grandiflorum

Herbaceous Perennial
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A compact, bushy perennial, to 25cm tall, with aromatic, ovate grey-green leaves. Loose clusters of rose pink flowers appear from summer into early autumn

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1–2 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
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)
H5
Drought Resistance
Yes

Colour & Scent

Fragrance Foliage
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Lamiaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Calamintha are pleasantly aromatic perennials with ovate leaves and loose clusters of small, 2-lipped flowers in summer and autumn in the axils of the upper leaves
Name Status
Correct
Plant Range
S Eur. to N Iran

How to Grow

Cultivation

Prefers a well-drained soil in an open position in full sun

Propagation

Propagate by seed or by division

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Mediterranean climate plants
  • Flower borders and beds
  • Garden edging

Pruning

Cut back in autumn

Pests

Generally pest-free

Diseases

May be susceptible to powdery mildews