Persicaria 'Blackfield Ampl.' - Kerzenknöterich - LumiBlumi

Red Bistort 'Blackfield'

CHF 5.95

Red Bistort 'Blackfield'

Name: Red Bistort 'Blackfield'
Brand: Persicaria
Price: 5.95 CHF
Availability: OutOfStock

Bistorta amplexicaulis 'Blackfield'

CHF 5.95

Deep dark red flower spikes from almost black buds
Very long flowering from July to October
About 90–110 cm tall
Dark green foliage, clump-forming
RHS Award of Garden Merit

'Blackfield' is a red bistort with particularly dark flowers. Velvety, deep dark red spikes open from almost black buds. It flowers without a break from July to October. The variety holds the RHS Award of Garden Merit and is a reliable source of food for bees.

About this variety

Colour is what makes 'Blackfield' special. The buds are almost black, the open flowers velvety burgundy to blood red. The slender spikes stand upright above dark green, lance-shaped foliage. The variety was introduced in 2005 and impresses with its exceptionally long flowering season.

A sunny to partly shaded spot with moist, loamy soil is ideal. At about 90–110 cm tall, 'Blackfield' suits the middle of beds and borders. Among soft grasses, silvery foliage or dark dahlias, the deep colour shows to particular advantage. It also goes well with pink asters and sedum.

Bees and butterflies visit the flowers into October. In the vase, the dark spikes give bouquets depth. The perennial is very hardy, robust and easy to care for. Over the years it forms a dense clump that bears more spikes each year and divides easily. Precisely because the colour is so dark, it looks especially refined next to pale grasses and white flowers. Planted in small groups, it forms a calm, velvety band that lasts into autumn.

Planting

Plant 'Blackfield' in spring from March to May or in autumn in September and October. Dig a planting hole twice the size of the root ball and set the root collar just below the surface. Space the plants 70–100 cm apart. Choose a sunny to partly shaded spot with moist soil. Then water them in.

Care

Water in dry weeks so that the soil stays moist. Add compost in spring. Cut off faded spikes. Cut the stems back to the ground in late autumn or spring. The clump can be divided every few years.

Specifications

Botanical name: Bistorta amplexicaulis 'Blackfield'
Genus: Perennials
Class: Various
Supplied as: Bare roots
Flower colour: Red
Flower size: 8 cm
Flowering time: July, August, September, October
Flowering season: High summer, Late summer and autumn
Foliage colour: Mid-green
Height: 100 cm
Spread: 100 cm
Habit: Clump-forming
Position: Sun, Partial shade
Suitable for: Bed, Wildlife garden and meadow, Woodland edge, Bed edge and border, Cutting garden
Soil type: Clay, Loamy
Drainage: Well-drained
Soil moisture: Moist
Soil pH: Neutral
Soil note: Suitable for many Swiss garden soils. A loose structure and good drainage matter more than a particular soil type.
Planting time: March, April, May, September, October
Planting depth: Just cover the root collar
Spacing: 70–100 cm
Number per m²: 1
Hardiness in Switzerland: Hardy in Switzerland
Hardiness by location: Hardy, also at higher altitudes
Hardiness zone (USDA): 3–4
Overwintering note: Generally hardy in garden soil in Switzerland. At high, windy sites and in containers, plan extra winter protection and avoid winter wet.
For containers: Only partly suitable for containers
Container note: Only recommended in a sufficiently large, stable, well-drained container.
Cut flower: Suitable as a cut flower
Naturalising: Not suitable
Naturalising note: Persists for several years in a suitable spot, but does not normally spread over larger areas on its own.
For bees and butterflies: Pollinator-friendly
RHS hardiness: H7