Common Soapwort Plant Care

Common Soapwort (Saponaria officinalis) belongs to the Caryophyllaceae family within the Saponaria genus. Common Soapwort is native to Europe, Asia. Common Soapwort is also known as Soapwort, Bruisewort, Latherwort.

Common Soapwort displays a low spreading groundcover growth habit, reaching up to 0.5 ft tall with a spread of approximately 1.5 ft. Common Soapwort produces small, fragrant pink or white flowers in clusters.

Leaf size: approximately 2 inches.

Water a young or newly planted Common Soapwort every 7–10 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Common Soapwort thrives in full sun to partial shade.

Saponaria officinalis tolerates temperatures of 50–75°F. Common Soapwort prefers humidity levels of 40–60%.

Well-draining, fertile soil with a neutral pH. Good drainage is essential for Common Soapwort to prevent waterlogging, which leads to root rot and fungal issues.

Feed Common Soapwort every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Choose a spot with full sun to partial shade and well-draining, fertile soil with a neutral pH. Avoid low spots where water collects after rain.

Common Soapwort is suited to USDA Zone 3a – 9b.

Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.

Common Soapwort can spread to about 2 ft (0.5 m) and reach about 1 ft (0 m) tall. Space plants about 2 ft (0.5 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the plant spacing calculator.

Prune Common Soapwort while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the shrub in one year.

Common Soapwort is hardy down to USDA zone 3a, so once established it can stay outdoors through winter in that zone and warmer ones.

Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.

Young and container-grown shrubs need extra protection: roots in a pot freeze much more easily than roots in the ground.

Common Soapwort can be propagated through seeds, division of clumps.

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Common Soapwort is susceptible to aphids, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Common Soapwort grows outdoors in USDA Zone 3a – 9b. It survives winters down to planting zone 3a. Common Soapwort is native to Europe, Asia.