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Lythrum salicaria Swirl

Lythrum salicaria Swirl
Purple Loosestrife, Black Blood, Long Purples

5,0/5
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The young plant was composed of two stems in perfect condition and very well packaged. They have grown nicely and today, I have lovely blooming flowers. I am satisfied with my purchase.

Marie, 17/07/2021

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This plant carries a 12 months recovery warranty

More information

Value-for-money
This willowherb is a beautiful perennial for wet or marshy soil, slightly smaller than the species, bearing elegant long spikes adorned with pink flowers in summer. It forms beautiful upright clumps, composed of woody stems carrying bright green lanceolate leaves reminiscent of those of willows. Hardy, sturdy, and prolific, it thrives in full sun or partial shade, on the banks of water bodies, where the stump is partially submerged. An ideal variety for small-sized ponds.
Flower size
35 cm
Height at maturity
60 cm
Spread at maturity
50 cm
Exposure
Sun
Hardiness
Hardy down to -34°C
Soil moisture
Damp soil
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Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time July to August
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Description

Lythrum salicaria 'Swirl', also known as purple loosestrife 'Swirl', is an elegant perennial for moist or marshy soil, bearing long, slender, and graceful spikes of pink flowers in summer. It forms beautiful upright clumps, although not as tall as those observed in the species. They consist of woody and sturdy stems with bright green lanceolate leaves resembling those of willows. Hardy, robust, and prolific, it thrives in full sun or partial shade, in ordinary but moist soil, along the banks of water bodies, where the rootstock is partially submerged. An ideal variety for small-sized ponds.

 

Common loosestrife is native to Europe, North Africa, and Northern Asia. It always grows in wet, even waterlogged soil, and frequently spreads in shallow water, at the edge of water bodies. This herbaceous perennial from the Lythraceae family has given rise to a few horticultural forms, including 'Swirl', which is shorter with pink spikes.

The 'Swirl' variety, anchored on a compact and powerful stump, is equipped with nodose rhizomes. It produces hairy, erect, woody, reddish-brown, leafy stems, forming a clump at least 60cm (24in) high and 50cm (20in) wide. In July-August, it bears magnificent inflorescences in the form of graceful spikes, 20 to 30cm (8 to 12in) long, filled with small pastel pink tubular flowers with a red throat. The flowers bloom from the base to the top. The flowering is followed by the formation of capsule-shaped fruits, whose seeds are often dispersed by water. The deciduous leaves are narrow and elongated, somewhat like those of willows.

 

Lythrum salicaria 'Swirl' is an easy-to-grow perennial, ideal for decorating the surroundings of water bodies or marshy areas, which it illuminates with its generous summer flowering. It pairs well with a multitude of plants and forms beautiful autumn compositions. Plant it in the company of Joe-Pye weeds, loosestrifes, Filipendula rubra 'Venusta', and marsh spurge, for example. In a wilder style, this robust perennial looks wonderful at the back of a border with grasses: miscanthus, panicum, stipa, for example.  It can be grown in borders in rather heavy and constantly moist soil, or in waterlogged containers. Its vertical silhouette forms a beautiful contrast with the majestic fountain-like habit of royal ferns. However, it can sometimes become invasive if the required conditions are met, self-sowing spontaneously in fertile, well-drained, and humid soil.

 

The common loosestrife was once consumed as a medicinal and edible plant during times of scarcity. The leaves can be eaten raw or cooked, while the stem and its pulp can be enjoyed after cooking. The flowers provide a red dye for confectionery.

Tips:

Cut the faded flowers in early autumn to limit its spread.

Lythrum salicaria Swirl in pictures

Lythrum salicaria Swirl (Flowering) Flowering
Lythrum salicaria Swirl (Foliage) Foliage

Flowering

Flower colour pink
Flowering time July to August
Inflorescence Spike
Flower size 35 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 60 cm
Spread at maturity 50 cm
Growth rate normal

Botanical data

Genus

Lythrum

Species

salicaria

Cultivar

Swirl

Family

Lythraceae

Other common names

Purple Loosestrife, Black Blood, Long Purples

Origin

Cultivar or hybrid

Product reference891721

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Planting and care

Easy to grow, Lythrum salicaria 'Swirl' thrives in sunny locations, in any moist and fertile, neutral to limestone soil, on the banks of a water body, or even partially submerged under 10cm (4in) of water. Cut off the faded flowers in early autumn to limit its spread.

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Planting period

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

Intended location

Suitable for Meadow, Woodland edge, Pond edge
Type of use Border, Edge of border, Back of border, Container, Slope
Hardiness Hardy down to -34°C (USDA zone 4) Show map
Ease of cultivation Amateur
Planting density 3 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Clayey (heavy), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light)
Soil moisture Damp soil, heavy and deep

Care

Pruning instructions Cut the faded flowers as they appear to prevent any spreading.
Pruning Pruning recommended once a year
Pruning time September to October
Disease resistance Very good
Overwinter Can be left in the ground
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