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Collector's item

Caryopteris divaricata Electrum

Caryopteris divaricata Electrum
Bluebeard, Blue Spirea, Blue Mist Shrub

5,0/5
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This plant is superb with its very variegated foliage. It quickly reached the expected size from the year of planting. It did not flower in its first year.

Virginie V., 30/10/2017

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This plant carries a 12 months recovery warranty

More information

Value-for-money
This Caryopteris is different. It forms a perennial bushy and compact clump with variegated foliage, completely disappearing in winter. In late summer and autumn, it is covered with small precious and finely designed blue flowers. Original, rare and very cold-resistant, for borders and containers.
Flower size
1 cm
Height at maturity
80 cm
Spread at maturity
60 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -15°C
Soil moisture
Moist soil
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Best planting time March to April, September to October
Recommended planting time March to May, September to November
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Flowering time August to October
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Description

Caryopteris divaricata 'Electrum', also known as Bluebeard, is a different species from other Caryopteris. The perennial bushy and compact tuft of foliage is variegated with cream. In late summer and autumn, it is covered with small infinitely precious blue flowers, topped with large curved stamens. Their white throat speckled with blue must be admired up close. Original, rare, very cold-resistant, this plant loves wild borders and sometimes thrives where least expected, in heavy soil.

 

 

Caryopteris divaricata is a recently renamed species, Tripora divaricata, and has been moved from the Verbenaceae family to the Lamiaceae family. It is native to East Asia, Japan or Nepal. 'Electrum' has a compact habit, forming a completely deciduous herbaceous tuft, 80cm (31.5in) tall, with a spread of 60cm (23.6in). Its foliage, very bright, consists of thin opposite and dentate leaves, variegated with almond green, cream, and white. It is carried by thin and slender stems. Flowering begins at the end of August and continues into September-October, consistently. The axillary flowers measure only 1 to 2cm (0.4 to 0.8in) and are densely clustered on peduncles. They are a pale blue, barely tinged with mauve, on the upper petals, and ultramarine blue on the lower, highly developed lobe. Their throat is lighter, speckled with a more intense blue-violet. Pure white stamens emerge gracefully from the heart of the flower, longer than it, and are gracefully arched towards the ground.

 

Caryopteris divaricata 'Electrum' is both very beautiful and very elegant. It is not a plant that will overshadow its neighbours; it likes to blend in. It brings lightness mixed with sensuality to the garden. Its variegated foliage will nicely enhance matte or dark greens in a large sunny or semi-shady border. It is an ideal plant for country gardens, cottage gardens, and natural gardens. It belongs to the strong and durable perennials, like Verbena bonariensis, Trachystemon orientalis, Symphytum 'Hidcote Blue', or even the marshmallow Althaea officinalis. It will also make a beautiful container on the terrace or balcony, allowing for a close-up view of its subtle flowering. It appreciates sun or semi-shade and soil that is not too dry in summer.

Caryopteris divaricata Electrum in pictures

Caryopteris divaricata Electrum (Foliage) Foliage

Flowering

Flower colour blue
Flowering time August to October
Inflorescence Cyme
Flower size 1 cm
Bee-friendly Attracts pollinators
Flowering description Clustered peduncles.

Foliage

Foliage persistence Deciduous
Foliage colour variegated with white
Foliage description Deciduous.

Plant habit

Height at maturity 80 cm
Spread at maturity 60 cm
Growth rate normal

Botanical data

Genus

Caryopteris

Species

divaricata

Cultivar

Electrum

Family

Lamiaceae

Other common names

Bluebeard, Blue Spirea, Blue Mist Shrub

Origin

Cultivar or hybrid

Product reference803371

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Planting and care

Quite hardy, Caryopteris divaricata 'Electrum' seems to adapt to all kinds of soils: it prefers humus-bearing and moist soils, but it also performs well in heavy or even poor soil, and it is quite resistant to heat. Occasional watering in summer will help it cope with heatwaves. You can plant it in full sun or partial shade.
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Planting period

Best planting time March to April, September to October
Recommended planting time March to May, September to November

Intended location

Suitable for Meadow, Woodland edge
Type of use Border, Container
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Amateur
Planting density 3 per m2
Exposure Sun, Partial shade
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, Fertile, well-draining

Care

Pruning instructions A pruning done at 25cm (9.8in) in spring (April-May) allows the young plant to be more floriferous and longer-lasting. Cut back the clump of dried foliage at the end of winter, not before.
Pruning Pruning recommended once a year
Pruning time April to May
Disease resistance Very good
Overwinter Can be left in the ground
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