Caryopteris × clandonensis 'Thetis'PBR

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bluebeard 'Thetis'

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Shrubs

A compact, hardy, deciduous shrub with strong, upright stems and long, aromatic toothed dark green foliage which is grey-silver underneath. Dark blue flowers appear from late summer through until the autumn

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

1-1.5 metres

Size

Time to Maturity
5–10 years
Max Spread
1-1.5 metres
Max Height
0.5-1 metres

Growing Conditions

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

Position

Full sun
Aspect
East–facing or 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
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, Columnar upright
Genus
Caryopteris can be deciduous shrubs or perennials, with aromatic, simple leaves and small blue or white flowers in compact axillary clusters in late summer and autumn
Name Status
Accepted

How to Grow

Cultivation

Grow in moderately fertile, light, well-drained soil in full sun. In areas where summers are cool or winter temperatures fall below -15°C it is ideal for planting near a warm sunny wall

Propagation

Propgate by softwood cuttings which can be taken between spring and midsummer; semi-ripe cuttings from mid to late summer and hardwood cuttings from late autumn to midwinter

Suggested planting locations and garden types

  • Cottage and informal garden
  • City and courtyard gardens
  • Wildlife gardens
  • Coastal
  • Low Maintenance
  • Flower borders and beds

Pruning

Pruning group 6

Pests

May be susceptible to capsid bug which causes leaf distortion

Diseases

May be susceptible to honey fungus