Lythrum salicaria 'Swirl' is an herbaceous perennial in the Lythraceae grown for its upright spikes of purple flowers. It forms clumps of deciduous foliage and flowers from July to September. Suited to full sun and moist soils, it tolerates both well-drained and poorly drained conditions. The cultivar performs well in south- or west-facing positions in exposed or sheltered sites.

Purple Loosestrife (Lythrum salicaria 'Swirl') produces purple flower spikes from July to September and suits moist, south- or west-facing borders.

Lythrum is a genus of 38 species of flowering plants native to the temperate world. Commonly known as loosestrife, they are among 32 genera of the family Lythraceae.

Lythrum salicaria 'Swirl'

Purple Loosestrife | Lythrum salicaria 'Swirl'

Lythrum virgatum 'Dropmore Purple' is a clump-forming perennial in the Lythraceae with deciduous foliage that flowers in mid to late summer. It favours a sunny position and tolerates a range of soils from clay to loam, including damp or poorly drained ground. Fully hardy in UK gardens (H7), it reliably produces season-long blooms from July to September. Plant it where its upright summer inflorescences can be seen from paths or borders.

Lythrum virgatum 'Dropmore Purple' is a clump-forming loosestrife for full sun, flowering July–September and suited to clay or loam and damp soils.