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A picture of a Blue Spirea

Blue Spirea

Caryopteris incana

Also known as

Californian Lilac

Photo by CandideUK (All rights reserved)

Full Sun
Light watering
Frost Hardy

H5

RHS hardiness

-15°C

Minimum temperature

Expected size

Height
Spread

1.25m

Max

1.5m

60cm

Min

75cm

Flowering

  • spring
  • summer
  • autumn
  • winter

Blue Spirea Overview

A dense, mound-forming plant native to China and Japan. Grey green leaves are ovate and toothed. Flowers come in bright purplish, white cymes in early autumn. Grows to a height of 1.5m.

Common problems with Blue Spirea

How to propagate Blue Spirea

Cuttings

Propagate by greenwood or semi-ripe cuttings in summer. Seed in autumn, cultivators by cuttings only in summer.

Seed

Other uses of Blue Spirea

Grown for their foliage and small but freely produced blue flowers. Suitable for coastal conditions.