Overview

Caryopteris x clan. 'Heavenly Blue' is a plant with a bushy habit in the genus Caryopteris, part of the Lamiaceae family, with deciduous foliage. Caryopteris x clan. 'Heavenly Blue' grows best in full sun, and tolerates most soils and any pH. Its UK hardiness is rated H4. Suggested uses include city and courtyard gardens, cottage and informal garden, patio and container plants, wildlife gardens, gravel garden and flower borders and beds.

About

Caryopteris x clan. 'Heavenly Blue' is a well-branched deciduous shrub in the mint family that flowers from August to October. It favours full sun and needs a sheltered, south- or west-facing spot on a free‑draining soil. Suited to chalk, loam or sandy soils across a range of pH, it performs well in containers, gravel beds and flower borders. The plant's flowering period makes it useful for late-summer to autumn interest.

About the genus

Caryopteris is a genus of flowering plants in the family Lamiaceae. They are native to east Asia.

Wikipedia contributors, "Caryopteris", CC BY-SA 4.0 — Caryopteris

In the garden

Caryopteris x clan. 'Heavenly Blue' sits in the Lamiaceae and is grown for its late-summer to autumn flowering, reliably producing blooms from August to October. It is a well-branched, deciduous shrub that prefers a sunny, sheltered location and will tolerate chalk, loam or sandy soils provided they drain freely. Soil pH is not a constraint, as it handles acid, neutral and alkaline conditions. Plant into a south- or west-facing bed or container where exposure is moderated by walls or taller planting; an exposed site can reduce flowering. Hardiness is H4, meaning average garden hardiness in the UK — it is suitable for most gardens but benefits from protection on very exposed sites in colder seasons. Keep to well‑drained soil: waterlogging is the main limiting factor for establishment and long-term health. Suggested uses include city and courtyard gardens, patios and containers, gravel gardens, cottage and informal borders, wildlife gardens and mixed flower beds. Positioning it on a sheltered, sunlit edge of a border or in a west-facing container will make the most of its August to October flowering window.

Growing conditions

Best soil and position for Caryopteris

Sunlight

Full sun

Soil type

Chalk, Loam, Sand

Soil pH

Acid, Alkaline, Neutral

Soil moisture

Well-drained

Aspect

South-facing, West-facing

Exposure

Sheltered

UK hardiness

H4

Plant details

Caryopteris x clan. 'Heavenly Blue' size, habit and characteristics

Habit

Bushy

Foliage

Deciduous

Suggested uses

City and courtyard gardens, Cottage and informal garden, Patio and container plants, Wildlife gardens, Gravel garden, Flower borders and beds

Care notes

Pruning and caring for Caryopteris x clan. 'Heavenly Blue'

Propagation

Softwood cuttings, Semi-ripe cuttings, Hardwood cuttings

Pest resistance

Capsid bug, Mealybug

Disease resistance

Honey fungus

Frequently asked questions