This hardy, herbaceous perennial bears pretty pink/white lightly-scented flowers in summer until autumn.
It grows in full sun/semi-shade. It will tolerate any soil, but if the soil is too rich in nutrients, Soapwort growth will be too rapid and difficult to control.
Avoid planting it near fish ponds — it has creeping rhizomes which excrete a poison in wet soil that is harmful to fish.
A natural lather can be made from the leaves, stems, flowers and roots. When boiled in water it releases saponins and produces a slippery substance which has the power to lift grease and dirt.