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Penstemon Blackbird - Beardtongue

Penstemon Blackbird
Bellflower Beardtongue, Canterbury Bells Penstemon

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This plant carries a 12 months recovery warranty

More information

A remarkable penstemon, very floriferous, with flowers of a splendid deep burgundy red, delicately punctuated with white.
Flower size
5 cm
Height at maturity
65 cm
Spread at maturity
50 cm
Exposure
Sun
Hardiness
Hardy down to -15°C
Soil moisture
Moist soil
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Best planting time April to May
Recommended planting time March to May, September to October
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Flowering time June to October
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Description

The Penstemon 'Blackbird' is an exceptional perennial, with the spectacular colour of its graceful trumpet-shaped flowers, very dark burgundy red, with a slightly white throat! It will bring grace, lightness, and sumptuous colours to your sunny flowerbeds!

The Penstemons, also known as Beardtongues, belong to the family of Scrophulariaceae (Plantaginaceae recently) and are native to Central and North America. Despite their relative lack of hardiness, they are highly floriferous perennial plants, essential in flowery gardens with a country look. Throughout the summer until late autumn, their beautifully coloured flowers bloom continuously in trumpet-shaped form, resembling those of foxgloves or snapdragons.

The Blackbird Penstemon, a semi-hardy ornamental perennial, forms a compact and upright bush, branched from the base, measuring 60 to 70 cm (24 to 28in), with a spread of about 50 cm (20in). From this tuft, upright stems with lanceolate leaves emerge, carrying long clusters of tubular flowers, widely open with unevenly lobed lips, from June to October. Extremely floriferous, it displays its splendid floral spikes, with garnet flowers slightly speckled with white above a light green evergreen foliage, revealing a superb contrast of colours. This long and abundant flowering can sometimes make the stems bend under the weight of the flowers. It is advisable to pinch the branches during growth to overcome this inconvenience. This will result in shorter, straighter floral stems with slightly delayed flowering.

 

Beardtongues prefer fertile, well-drained, and relatively dry soils in sunny locations. They are hardy enough to excel in flowery gardens with a wild look, where their opulent and beautifully coloured flowers will work wonders! This Penstemon Blackbird is perfect in flower beds, mixed borders, flower beds, rockeries, or pots. Its flowers will also make beautiful bouquets. Harmoniously integrating into summer flower beds or rockeries, it can be paired with perennials of various colours and plants in contrasting colours. It will blend beautifully with rudbeckias, loosestrifes, knotweeds, stonecrops, lupins, mallows, phloxes, or lady's mantles.

 

 

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Penstemon Blackbird - Beardtongue in pictures

Penstemon Blackbird - Beardtongue (Flowering) Flowering
Penstemon Blackbird - Beardtongue (Foliage) Foliage

Flowering

Flower colour red
Flowering time June to October
Inflorescence Spike
Flower size 5 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Semi-evergreen
Foliage colour medium green

Plant habit

Height at maturity 65 cm
Spread at maturity 50 cm
Growth rate fast

Botanical data

Genus

Penstemon

Cultivar

Blackbird

Family

Scrophulariaceae

Other common names

Bellflower Beardtongue, Canterbury Bells Penstemon

Origin

Cultivar or hybrid

Product reference7818481

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Planting and care

To grow Penstemons successfully, you should place them in a sunny spot in colder areas, and a partially shaded and cool spot in hotter areas. These plants grow best in light, rich, well-draining soil that's moist but not too dry. They can tolerate limestone, but slightly acidic soil is also suitable.

 

Penstemons are easy to take care of and can tolerate winter temperatures as low as -10°C (14°F). To help them survive the winter, don't cut back the Blackbird clump at the end of the season. Its semi-evergreen foliage helps regulate soil moisture. You should also protect the base of the plant with mulch at the beginning of winter. Use a dry mulch, such as a layer of dead leaves, sand, or crushed gravel for better drainage. This will help prevent collar rot caused by excess moisture.

 

Penstemons should be planted in the spring, and light fertilisation at planting is beneficial. Avoid fertilising afterwards, as it may result in thin and loose stems, making the plant less able to withstand winter.

 

Penstemons are usually healthy, but they can be vulnerable to powdery mildew, downy mildew, and can be attacked by snails, slugs, and chrysanthemum nematodes.

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Planting period

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

Intended location

Suitable for Meadow, Rockery
Type of use Border, 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 Acidic, Neutral
Soil type Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, Fertile, well-drained, sandy

Care

Pruning instructions Once frosts are no longer a threat, the base should be cleared in early spring by pruning back to 20 cm. This will encourage branching and flowering. During flowering, dead flowers should be removed as and when they appear by cutting off the flower spikes in the axils of new shoots (between the stem and the leaves), inducing a second wave of flowers and keeping the plant vigorous and compact.
Pruning Pruning recommended once a year
Pruning time April to May, August to September
Disease resistance Very good
Overwinter Can be left in the ground

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