Saponaria officinalis
True Soapwort
Common names: Common Soapwort, Washwort
Photo: CC BY-SA 3.0 · Source
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Description
True Soapwort (Saponaria officinalis) is a hardy, long‑lived perennial in the primrose family that produces fragrant, pink to white flower spikes from June to September. It spreads readily by vigorous runners, making it well suited for wild corners, pathways, or naturalistic perennial beds where it attracts bees and moths. All parts of the plant, especially the root and leaves, contain saponins that can cause nausea and irritation if ingested; children and pets should not chew on it. Historically it was used as a natural soap for delicate fabrics, which gave it its German name.
Care instructions
Soapwort prefers a sunny to semi‑shaded position with well‑drained, somewhat lean soil and tolerates drought well. Plant in spring or fall and give a light watering until established. Because the runners spread quickly, a root barrier or annual thinning is advisable if you want to keep the area contained. After flowering, cut the stems back to the ground to encourage a second, smaller bloom in late summer. The ‘Rosea Plena’ variety with fuller flowers requires the same care and thrives in dry, sparse sites.
Soil & site
Soil pH
Soil type
nutrient-rich, well-drained, moist, loamy
Feeding
Medium feeder
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