Lythrum salicaria

Lythrum salicaria, better known as common loosestrife or purple loosestrife, is an elegant perennial native to damp or marshy soil appreciated for its superb summer flowering in long, slender spikes adorned with bright carmine pink flowers. It forms beautiful upright tufts with willow-like foliage, as decorative as a bush. Hardy, sturdy, and prolific, it thrives in full sun or partial shade, in ordinary but moist soil, on the banks of water bodies, or even partially submerged. It is an ideal plant for adorning the edges of ponds.

Common loosestrife is native to Europe, North Africa, and Northern Asia. It always grows in moist, even waterlogged soil, and frequently spreads in shallow water, at the edge of water bodies. This herbaceous perennial belongs to the Lythraceae family. It is very resistant to cold and not demanding in terms of soil type, as long as it is not too acidic.

Anchored on a compact and powerful stump, with nodose rhizomes, loosestrife produces hairy, upright, woody, and leafy stems from spring. The reddish-brown stems form a tuft at least 1m (3ft) high and 70cm (28in) wide. In July-August, magnificent inflorescences appear, in the form of graceful spikes, 30 to 40cm (12 to 16in) long, adorned with clusters of small tubular flowers with 6 bright pink petals and 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 disappear in winter while the stems dry out. The dark green leaves are narrow and elongated, similar to willow leaves.

Lythrum salicaria is an easy-to-grow perennial, ideal for adorning the edges of water bodies or marshy areas, which it illuminates with its generous summer flowering. It pairs well with a multitude of plants and forms magnificent autumn compositions. Plant it together with eupatoriums, other loosestrifes, rodgersias, Filipendula rubra 'Venusta', and Euphorbia palustris, for example. In a wilder style, this imposing perennial looks wonderful in the back of a bed with tall grasses: miscanthus, panicum, stipa. It can be grown in beds with rather heavy and consistently moist soil, or in waterlogged containers. Its vertical silhouette forms a beautiful contrast with the majestic fountain-like habit of osmundas. However, it can sometimes become invasive if the conditions are right, self-seeding in fertile, well-drained, and moist soil.

Common loosestrife was once consumed as a medicinal and edible plant during times of famine. The leaves can be eaten raw or cooked, while the stem and its pulp can be consumed after cooking.

Tips:

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