Bluebeard

Sun

Full sun; shade reduces flowering and encourages loose, floppy growth.

Water

Water regularly during establishment, allowing the soil surface to dry between waterings. Established plants tolerate dry spells but may need deep watering during prolonged drought.

Soil

Well-drained soil, including sandy, chalky or stony ground. Tolerates moderately fertile loam but struggles in heavy soil that stays wet, especially in winter.

Height

2-4 ft (0.6-1.2 m)

Spread

2-4 ft (0.6-1.2 m)

Flowers

Clusters of blue to violet-blue flowers from late summer into early autumn; timing and shade vary by cultivar and climate.

Foliage

Opposite, narrow, toothed leaves, usually grey-green and aromatic when rubbed; some cultivars have yellow or variegated foliage.

Growth

Moderate to fast; makes substantial new growth each spring.

Care needed

Low

• Pollinators
• Deer resistant
• Drought tolerant
• Heat tolerant
• Low allergen
• Fragrant

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Very tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   1.6 ft (0.5 m)

2. After 1 year

   2 ft (0.6 m)

3. After 2 years

   2.3 ft (0.7 m)

4. After 3 years

   2.6 ft (0.8 m)

5. After 5 years

   3 ft (0.9 m)

   full size

About 4 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Safe

Growth rate

Fast

• Plant in full sun with good drainage; use a raised bed if your soil stays wet.
• Water deeply during the first growing season, then mainly during prolonged dry spells.
• Avoid rich manure and heavy feeding, which encourage soft growth at the expense of flowers.
• Keep mulch clear of the crown and woody stem bases.
• In cold areas, choose a sheltered spot and avoid autumn pruning.

Pruning. In early to mid-spring, once buds begin to swell and severe frost is unlikely, cut the previous year's stems back to strong low buds, usually 6-12 in (15-30 cm) above ground. Remove dead stems; flowers develop on the new season's growth.

Spring

Plant once the ground is workable and no longer waterlogged; water thoroughly.

Early to mid-spring

Prune to strong low buds as growth starts, removing any winter-killed wood.

Late spring

Check new plants for dry soil and water deeply as needed.

Early summer

Take softwood cuttings from healthy, non-flowering shoots.

Late summer

Water during prolonged drought to support flowering, particularly in containers.

Autumn

Leave stems standing rather than cutting back; clear wet debris away from the crown.

• Plant in small groups near the front or middle of a sunny border for late-season blue flowers.
• Combine with ornamental grasses and stonecrop for contrasting textures and autumn interest.
• Use alongside lavender and catmint in a well-drained gravel garden to extend the flowering season.
• Pair with yellow-flowered perennials for a clear blue-and-yellow contrast.

Garden styles it suits: Cottage garden, New perennial (prairie), Pollinator garden, Dry gravel garden, Low-maintenance and Mediterranean.

Plant it with: Lavender, Catmint, Stonecrop, Coneflower, Black-eyed Susan and Feather reed grass.

Wildlife: The flowers provide late-season nectar and pollen for bees and attract butterflies and other flower-visiting insects.

• Root or crown rot in wet soil: improve drainage or move to a raised position; replace plants with extensively rotted roots.
• Winter stem dieback: wait for spring growth, then cut back to living buds; in zone 5, the whole top may die back.
• Sparse flowers and floppy stems: provide more sun, stop heavy feeding and prune in spring.
• Capsid bug damage to young leaves, especially in the UK: inspect distorted shoots; light damage usually needs no treatment.

Not known to be toxic to people, cats, dogs or horses. No poisonous plant part is established, but specific animal-toxicity information is limited; it is not an edible plant.

• Russian sage (Salvia yangii)

  Usually taller and airier, with more deeply cut, silvery leaves and long, open sprays of small flowers rather than compact clusters around the upper stems.

• Chaste tree (Vitex agnus-castus)

  Has palmately compound leaves with several leaflets and long terminal flower spikes; it usually becomes a much larger shrub or small tree.

Caryopteris comes from Greek words meaning nut and wing, referring to the winged fruit, while bluebeard describes the blue flowers with their projecting stamens.

Propagation. Take softwood cuttings in late spring or early summer, or semi-ripe cuttings later in summer. Seedlings, if produced, may not match the parent; use cuttings to preserve a cultivar.

Accepted botanical name

Caryopteris clandonensis

Sources: GBIF (CC BY 4.0) and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.