Lythrum alatum, commonly known as winged loosestrife or milkweed, is a clump-forming herbaceous perennial in the Lythrum genus. This deciduous plant thrives in full sun and can be grown in a variety of soil types, including chalk, clay, loam, and sand, with moisture levels ranging from moist but well-drained to poorly-drained. It is hardy in the UK (H7) and suitable for east, south, or west-facing aspects in both exposed and sheltered locations. Lythrum alatum is ideal for cottage and informal gardens, wildlife gardens, and wildflower meadows, offering interest through summer and autumn. Propagation is by division or basal cuttings in spring.

Lythrum alatum, winged loosestrife, is a hardy herbaceous perennial for full sun, ideal for wildlife gardens and wildflower meadows in summer and autumn.

Lythrum alatum

Winged loosestrife | Lythrum alatum

It is native to Europe but it is known elsewhere, including parts of Australia and eastern and western North America, as an introduced species and sometimes a weed. It is rare in the United Kingdom, with occasional isolated populations. It often grows in moist habitats, such as marshes and wet agricultural fields, rice paddies, for example. It is a mostly upright, branching annual or biennial herb growing 10 to 60 centimeters (3.9 to 23.6 in) tall. Grow it in full sun and most soil types. In UK gardens it is fully hardy throughout the UK (RHS H7). It works well for cottage and informal garden, wildlife gardens and wildflower meadow. It tolerates soil of any pH, moist but well-drained, poorly-drained conditions and east-facing, south-facing and west-facing aspects. Plant out after last frost in fertile, well-drained soil.

Lythrum hyssopifolia, commonly known as grass poly or hyssop-leaved loosestrife, belongs to the Lythraceae family. This species showcases simple leaves arranged in pairs and is characterized by its small, star-like flowers that cluster in leafy racemes.

https://en.wikipedia.org/wiki/Lythrum_hyssopifolia

Lythrum hyssopifolia

Grass poly | Lythrum hyssopifolia

Lythrum portula is a species of flowering plant in the loosestrife family known by the common names water-purslane and spatulaleaf loosestrife. It is native to Europe, and it is found in parts of western North America as an introduced species. It often grows in moist habitat, such as marshes. This is a prostrate annual herb producing a hairless, reddish stem up to 25 centimeters long, which lies along the ground and roots where its nodes come in contact with wet earth. In the garden it prefers full sun and most soil types. In UK gardens it is fully hardy throughout the UK (RHS H7). Suggested uses include cottage and informal garden, wildlife gardens and wildflower meadow. It tolerates soil of any pH, moist but well-drained, poorly-drained conditions and east-facing, south-facing and west-facing aspects.

Lythrum portula, or water purslane, is a hardy herbaceous perennial for full sun, ideal for wildlife gardens and wildflower meadows in summer and autumn.

https://en.wikipedia.org/wiki/Lythrum_portula

Lythrum portula

Water purslane | Lythrum portula

Lythrum salicaria is a perennial herbaceous plant in the Lythraceae, notable for its purple flowers. It typically reaches around 1.0 m in height and flowers from July to September. It prefers full sun and seasonally damp ground. It will tolerate a range of soils from sandy to clay provided they remain moist or wet.

Purple loosestrife (Lythrum salicaria) flowers from July to September and suits full sun in moist or wet sandy, loamy or clay soils.

https://en.wikipedia.org/wiki/Lythrum_salicaria

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

Purple loosestrife | Lythrum salicaria

Lythrum salicaria or purple-loosestrife is a flowering plant belonging to the family Lythraceae. It should not be confused with other plants sharing the name loosestrife that are members of the genus Lysimachia in the family Primulaceae.

Blush Purple Loosestrife (Lythrum salicaria 'Blush') is a hardy perennial for full sun, ideal for borders, wetlands, and naturalising in UK gardens.

Lythrum salicaria 'Blush'

Lythrum salicaria 'Brightness' is a perennial that produces upright spikes of purple flowers. It typically grows to about 1.0 m and flowers in summer. Plants suit sunny positions and tolerate a range of soils from sand to clay. They prefer consistently moist or wet ground but will also grow in moist, well-drained sites.

Purple Loosestrife Lythrum salicaria 'Brightness' produces upright purple flower spikes from July to September and suits sunny, moist soils.

Lythrum salicaria 'Brightness'

Purple Loosestrife | Lythrum salicaria 'Brightness'

Dropmore Purple Loosestrife is a hardy perennial for full sun, ideal for borders, wetland gardens, and naturalising with vibrant summer flowers.

Lythrum salicaria 'Dropmore Purple'

Lythrum salicaria 'Firecandle' ('Feuerkerze') is a perennial in the Lythraceae that carries purple flowers and reaches about 1.0 m. It flowers July to September. Plant in full sun in sandy, loamy or clay soils that are moist or wet yet can be well drained. Fully hardy in the UK (H7) and suited to USDA zones 3–10.

Lythrum salicaria 'Firecandle' ('Feuerkerze') bears purple flowers from July to September and suits moist, full-sun sites.

Lythrum salicaria 'Firecandle' ('Feuerkerze')

Purple Loosestrife | Lythrum salicaria 'Firecandle' ('Feuerkerze')

Lythrum salicaria 'Florarose' is a clump-forming herbaceous perennial cultivar of the Lythrum genus, known for its simple, opposite leaves and star-like flowers arranged in leafy racemes. This deciduous plant thrives in full sun on a south-facing, sheltered aspect and prefers moist, poorly-drained loam or clay soils with a range of pH levels from acid to alkaline. Hardy to UK zone H7, it is suitable for cottage and informal gardens, wildlife gardens, wildflower meadows, and flower borders. It is best planted after the last frost in fertile soil and can be propagated by division in spring, with interest in both spring and summer.

Lythrum salicaria 'Florarose' is a hardy H7 herbaceous perennial with star-like flowers, ideal for sunny borders, wildflower meadows, and wildlife gardens.

Lythrum salicaria 'Florarose'

Lythrum salicaria 'Morden's Pink' is a perennial loosestrife cultivar that produces upright stems to about 1.0 m bearing spikes of flowers from July to September. It grows best in full sun and tolerates sandy, loamy or clay soils that remain moist or wet. Fully hardy (H7, USDA 3–10), it suits damp borders, wet ground and naturalising in suitable sites. Plant where summer-to-early-autumn flower spikes are needed for structure and continuity.

Morden's Pink Loosestrife (Lythrum salicaria 'Morden's Pink') flowers from July to September and suits moist borders, wet areas and naturalising sites.

Lythrum salicaria 'Morden's Pink'

Morden's Pink Loosestrife | Lythrum salicaria 'Morden's Pink'

Lythrum salicaria 'Robert' is a perennial in the Lythraceae that forms upright stems to about 1.0 m bearing vertical spikes of purple flowers. It flowers from July to September. Plant in full sun on moist soils ranging from sandy to clay; it is fully hardy in the UK (H7).

Purple Loosestrife 'Robert' (Lythrum salicaria 'Robert') produces purple flower spikes from July to September and suits damp borders and water gardens.

Lythrum salicaria 'Robert'

Purple loosestrife 'Robert' | Lythrum salicaria 'Robert'

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 salicaria 'Swirl'

Purple Loosestrife | Lythrum salicaria 'Swirl'

Lythrum virgatum, commonly known as wand loosestrife, is a clump-forming herbaceous perennial belonging to the Lythraceae family. This deciduous plant thrives in full sun and can be grown in a variety of soil types, including clay and loam, with poor drainage. It is suitable for both exposed and sheltered positions, favouring south or east-facing aspects. Lythrum species typically have simple, opposite leaves and star-like flowers arranged in leafy racemes, making this cultivar a charming addition to cottage gardens, wildflower meadows, and flower borders during spring and summer.

Lythrum virgatum, wand loosestrife, is a hardy herbaceous perennial for full sun, ideal for wildlife gardens and flower borders in spring and summer.

Lythrum virgatum

Wand loosestrife | Lythrum virgatum

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.

Lythrum virgatum 'Dropmore Purple'

Wand Loosestrife | Lythrum virgatum 'Dropmore Purple'

Lythrum virgatum 'Rose Queen' is a perennial in the Lythraceae grown for summer flowering and use in borders, water gardens and as a cut flower. It favours full sun or partial shade and soils that remain moist yet well-drained, across acidic to alkaline pH. Rated H5 (hardy), it suits many parts of the UK and flowers from July to September.

Lythrum virgatum 'Rose Queen' is a perennial loosestrife for moist, well-drained soils that flowers July to September.

https://en.wikipedia.org/wiki/Lythrum_virgatum

Lythrum virgatum 'Rose Queen'

Purple Loosestrife | Lythrum virgatum 'Rose Queen'

Lythrum virgatum 'The Rocket' is a perennial wand loosestrife selected for its erect summer flower wands. It suits any moist site and tolerates a wide range of soil pH. Plant in full sun or partial shade where soil remains damp but not waterlogged. Expect blooms from July to September.

Wand Loosestrife 'The Rocket' is a hardy perennial for moist borders and pond edges, flowering July to September.