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Caryopteris, the famous “bluebeard”

Caryopteris - bluebeard
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Fragrant leaves, a rounded outline and a haze of colour that arrives in late summer and autumn, when most shrubs have finished: caryopteris (Caryopteris x clandonensis), or bluebeard, is visited again and again by butterflies and bees. Give it sun, shelter and light, well-drained soil, and it flowers freely.

Caryopteris at a glance
Name Caryopteris x clandonensis
Family Lamiaceae
Type shrub
Height 5 feet (1.5 meters)
Exposure full sun
Soil rather rich
Foliage deciduous
Flowering Summer/Autumn

Planting caryopteris

Caryopteris is a flower shrub that is preferably planted in fall or spring, and even in summer if purchased in a container.

Its resistance to the cold and to freezing is low, since it suffers when the temperature drops below 23°F (-5°C).

Season for planting caryopteris

You can plant caryopteris in fall, provided that winter isn’t too cold in your area, especially for those varieties that tend to be sensitive to the cold.

  • Caryopteris likes sun.
  • On the seaside, prefer an emplacement that is sheltered from wind.

How to plant caryopteris

Caryopteris isn’t too demanding as regards the quality of the soil, but proper planting will ensure good settling in, better development and abundant blooming.

Planting caryopteris in a flower bed
Leave 20 to 32 inches between plants
  • Caryopteris likes light and well drained soil types, even poor ones.
  • It is a plant that execrates excessively rich soil, and will respond by producing leaves excessively, foregoing flowers altogether.
  • Place plants at least 20 to 32 inches (50 to 80 cm) apart.
  • Mix planting soil mix with garden soil.
  • Follow our advice on planting shrubs.

Propagating caryopteris

Making cuttings in summer is the easiest and fastest method to propagate caryopteris.

  • Snip 6-inch (15 cm) cuttings off new growth stems that have only partly hardened off.
  • Remove lower pairs of leaves, keeping only the topmost 1 or 2 levels.
  • It is possible to dip the cuttings in powdered rooting agents to increase the success rate.
  • Plant the cuttings in special cutting soil mix.
  • Keep the cuttings near light, without direct sunlight.
  • Seed collected from Caryopteris x clandonensis will not come true, because it is a hybrid of Caryopteris incana and Caryopteris mongholica.
  • Keep rooted caryopteris cuttings in their pots under frost-free shelter for their first winter, as young plants are markedly less hardy than established shrubs and are easily damaged by hard frost.

Pruning and caring for caryopteris

Caryopteris is a plant that requires little care, even if some practices when seen through will extend the blooming and protect it in winter.

Very resilient in the face of drought, cold and most diseases, caryopteris is a hardy ornamental plant.

It also fares well when grown in pots, especially if it freezes strongly in your area and you can bring it in for shelter in winter.

When in pots, you’ll also have to remember to water when the surface of the soil is dry.

Care in spring and summer

Caring for caryopteris will lead to nice blooming
Light mulch stops weeds and holds soil moisture
  • Light mulch avoids weed growth and retains moisture in the soil.
  • For specimens grown in pots, adding flower plant fertilizer in spring will help nourish the soil.

Care in fall and winter

  • Prune back short at the end of winter, this will help produce an even more spectacular blooming in summer.
  • This severe pruning is important for the upkeep of a compact bearing and a nice blooming.
  • Covering the plant with thick dried leaves mulch will help protect from from freezing.

Pruning caryopteris

As mentioned above, pruning consists in cutting the caryopteris back after the blooming and covering the plant with a thick layer of leaves.

If the climate in your area is harsh, wait for spring before pruning.

Learn more about caryopteris

Caryopteris, sometimes called bluebeard, is remarkable for its unique blooming in fall, the color of its flowers but also its fragrant leaves.

Dark knight caryopteris
‘Dark Knight’, one of the many named forms

There are many varieties, like the ‘White surprise’ or the ‘Summer sorbet’ and the plant is easily recognizable by checking on its superb mottled leafage. There also are pink varieties such as the ‘Autumn pink’.

Shown here are pictures of the ‘Dark Knight’ Caryopteris and the ‘Lissilv Sterling Silver’, which has silvery foliage.

Caryopteris lissilv sterling silver variety
‘Lissilv Sterling Silver’ is grown for silvery foliage

It grows to form a shrub that gives a flower bed a round and colorful touch, and is particularly well-liked by butterflies and bees that visit it repeatedly.

There are many caryopteris hybrids, even if these are reputed to be more vulnerable to freezing.

Although this plant it easy to grow, it does ask to be set in a spot that is sheltered and endowed with sun. No diseases have been reported to infect it.

Which caryopteris to choose

The named forms differ mainly in foliage and flower colour rather than in habit. Here are the ones mentioned above, and what sets each one apart.

Which caryopteris to choose
Variety Distinctive feature Chosen for
‘White surprise’ Mottled, variegated leafage Foliage interest as well as flowers
‘Summer sorbet’ Mottled, variegated leafage A brightly marked shrub in a bed
‘Autumn pink’ Pink flowers Gardeners wanting pink instead of the usual bluebeard colour
‘Lissilv Sterling Silver’ Silvery foliage A pale, soft-leaved effect in the border
‘Dark Knight’ Classic bluebeard shown in the pictures here The familiar flowering form

Whichever you pick, remember that hybrids are reputed to be more vulnerable to freezing.

Smart tip about caryopteris

Mulch will protect the caryopteris from freezing when winters are cold.


Image credits (edits Gaspard Lorthiois):
Public Domain: Karen Hine
CC BY 2.0: Patrick Standish, Jim
Pixabay: Jacques Gaimard, TinyHand

Written by Gaspard Lorthiois | Loves helping out, especially when it comes to growing things. Worked in herbal medicine, runs a farm, and dabbles in tech. Master's degree and engineer.