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Penstemon Countess of Dalkeith - Beardtongue

Penstemon Countess of Dalkeith
Bellflower Beardtongue, Canterbury Bells Penstemon

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This plant carries a 12 months recovery warranty

More information

The Penstemon 'Countess of Dalkeith', with large purple-violet flowers.
Height at maturity
80 cm
Spread at maturity
40 cm
Exposure
Sun
Hardiness
Hardy down to -15°C
Soil moisture
Moist soil
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Best planting time March to April
Recommended planting time February to May
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Flowering time July to October
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Description

This genus is home to several hundred species and cultivars, almost all originating from North America. Although some are shrubby, most of them are perennial and herbaceous. It is worth noting that if the winter is not too harsh, their evergreen foliage remains decorative throughout. 

 

This particular variety is robust and produces large purple-violet flowers with a pure white throat.

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Penstemon: planting, pruning and care
Family sheet
by Alexandra 16 min.
Penstemon: planting, pruning and care
Read article

Penstemon Countess of Dalkeith - Beardtongue in pictures

Penstemon Countess of Dalkeith - Beardtongue (Flowering) Flowering

Flowering

Flower colour violet
Flowering time July to October
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Evergreen
Foliage colour medium green

Plant habit

Height at maturity 80 cm
Spread at maturity 40 cm
Growth rate normal

Botanical data

Genus

Penstemon

Cultivar

Countess of Dalkeith

Family

Plantaginaceae

Other common names

Bellflower Beardtongue, Canterbury Bells Penstemon

Botanical synonyms

Penstemon ‘Purple and White’, Penstemon ‘Purpureus Albus’

Origin

Cultivar or hybrid

Product reference84051111

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Planting and care

These plants aren't very hardy, but some like P. cobæa, P. utahensis or P. digitalis can withstand temperatures as low as -30°C (-22°F) if the soil is dry. However, in most parts of the UK, they can be grown in rich, well-drained soil and full sun. If you live in a cold region, plant them in a warmer spot; if you live in a hot region, plant them in a cooler, semi-shaded spot. Don't cut back the foliage at the end of the season, even though it might look ugly in winter, as it still helps regulate moisture. Clear and divide the shrubs in early spring. We grow around a hundred different species and varieties. The smaller, delicate ones go in the rockery, while the more robust ones go in the flowered paving with garden irises, or in gravel gardens with buglosses, cistuses, lavenders, cotton lavenders, rosemary and marjoram.

Planting period

Best planting time March to April
Recommended planting time February to May

Intended location

Suitable for Meadow
Type of use Border, Cut flowers, Container
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun
Soil pH Neutral
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil rich and well-draining

Care

Pruning Pruning recommended once a year
Pruning time March to April
Disease resistance Good
Overwinter Can be left in the ground

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