Penstemon barbatus Twizzle Scarlet - seeds
Penstemon barbatus Twizzle Scarlet - seeds
Penstemon barbatus Twizzle Scarlet - seeds
Penstemon barbatus Twizzle Scarlet
Beardtongue, Scarlet Bugler
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Description
Penstemon barbatus 'Twizzle Scarlet' is a remarkable selection of bearded penstemon, known for its long and sturdy flower stems, fast growth, and generous summer flowering in vibrant red. For three months, its tall stems emerge from the borders, adorned with graceful, eye-catching bells. This hardy perennial penstemon is drought-tolerant and thrives in fairly fertile, well-drained soils, basking in the sun.
Penstemon barbatus 'Twizzle Scarlet' is part of a series of recent hybrid penstemons, the 'Twizzle' series, created by Van Hemert & Co in the Netherlands, and awarded by Fleuroselect for their performance. These perennial plants are capable of flowering in their first year, producing taller flower stems than usual varieties while retaining the natural elegance of the botanic species Penstemon barbatus. The plants are upright and offer high-quality flowering from July to September. This series consists of several cultivars with various colours: Twizzle Coral, Twizzle Purple, Twizzle Scarlet, Twizzle White, and Twizzle Blue.
Penstemon barbatus 'Twizzle Scarlet' is a herbaceous perennial from the Plantaginaceae or Scrophulariaceae family, depending on the classification. It forms a semi-evergreen basal clump in winter, composed of fine, linear, bluish-green foliage, from which thick and sturdy flower stems emerge in July, reaching a height of 80 cm (32in). The 2.5 cm (1in) long, vibrant red, tubular bell-shaped flowers are distributed along the upper part of the stem, spanning 30 cm (12in). This plant has a deep root system, which can make transplantation challenging but allows it to find some moisture at depth.
Penstemon barbatus 'Twizzle Scarlet' is best planted in sunny, well-drained borders, alongside bushy salvias, toadflaxes, and grasses such as Stipa tenuifolia or Muhlenbergia capillaris. It is a cheerful, nectar-rich plant with a wild charm, which will accompany annual poppies, small blue aster stars, and Damask nigellas. It is also beautiful for containers and cut flowers.
Penstemon barbatus Twizzle Scarlet - seeds in pictures
Flowering
Foliage
Plant habit
Botanical data
Penstemon
barbatus
Twizzle Scarlet
Scrophulariaceae
Beardtongue, Scarlet Bugler
Cultivar or hybrid
Planting and care
Sow 'Twizzle' penstemon seeds from late winter to mid-spring on the surface of good potting soil, barely covering the seeds with a thin layer of compost or vermiculite. Germination takes 14 to 30 days at 16-18°C (60.8-64.4°F). Keep in the light, in a sealed polythene bag.
When the plants are large enough to handle, transplant them into 8 cm (3in) pots or trays and grow them on in cooler conditions. Then gradually acclimatise them to outdoor conditions and plant them outside in late spring or early autumn, 30 cm (12in) apart. Set them outdoors in full sun and well-drained soil.
Penstemon barbatus is a mountain plant. As such, it can tolerate some drought but not extreme heat. Its flowers will be more beautiful in the sun and in slightly moist soil, but it must be well-drained. In very clayey, heavy, and poorly drained soil, it is essential to mix river sand or fine gravel with the planting soil and loosen the soil to a depth of 50 cm (20in).
Sowing period
Intended location
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.