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A picture of a Purple Loosestrife

Purple Loosestrife

Lythrum spp.

Also known as


Lythrum salicaria, purple loosestrife 4 by liz west (CC BY 2.0)

Full Sun
Easy care
Moderate watering
Frost Hardy


RHS hardiness


Minimum temperature

Expected size








3 years to reach maturity


  • spring
  • summer
  • autumn
  • winter

More images of Purple Loosestrife

A close up of some purple Lythrum flowers
A photo of Purple Loosestrife
A photo of Purple Loosestrife
A photo of Purple Loosestrife

Purple Loosestrife Overview

Lythrum is a genus containing around 40 annual or perennial plants that have a wide distribution throughout the temperate world. A popular garden plant, a variety of cultivars and varieties from different species are available. Commonly known as Loosestrife, these plants often have square stems, slender-leaves and spikes of star-like flowers in shades of purple, pink and white. They flower in summer - often for several months. In cultivation they do best in a moist habitat, forming attractive clumps of lance-shaped leaves. Plant near water, with other plants that enjoy moist soil. They are happy in full sun or partial shade. Many species and cultivars self-seed generously though, so deadhead old flowers regularly if not required to spread.

Common problems with Purple Loosestrife

Purple Loosestrife Companion Plants

How to propagate Purple Loosestrife




Special features of Purple Loosestrife

Attractive flowers

Attractive leaves

Wet sites

Attracts bees

Attracts butterflies

Attracts useful insects

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