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Thyme-leaved Sandwort

Arenaria serpyllifolia · Caryophyllaceae

The gardener's calendar

The right move for September

Ideal time to plant thyme-leaved sandwort: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

JFMAMJJASOND Planting

ID card

Scientific name
Arenaria serpyllifolia
Family
Caryophyllaceae
Type
Annual or biennial herbaceous plant
Adult size
10 to 30 cm in height
Foliage
Deciduous, small linear leaves
Flowering
April to July, white flowers
Hardiness
Very hardy, tolerates -15 °C
Origin
Mediterranean region and central Europe

Care

Light exposure

Thyme-leaved sandwort prefers full sun or partial shade. It appreciates bright, well-ventilated locations that promote compact development. Avoid areas that are too humid and shaded, as these slow its growth.

Soil

This plant appreciates well-draining, light, and rather poor soils. A sandy or rocky substrate works perfectly and prevents root waterlogging. It tolerates calcareous soils and unfertilized conditions well.

Watering

Water moderately, particularly during the active growing period. Let the soil dry out slightly between waterings to prevent root rot. Once established, this plant tolerates temporary drought well.

Fertilizer

A light application of balanced fertilizer in spring is more than sufficient. Avoid excess nitrogen, which promotes leaf growth at the expense of flowering. On naturally poor soils, no fertilizer is often necessary.

Pruning and cleanup

No formal pruning is required. Simply remove any dried or diseased parts in spring to encourage a compact shape. After flowering, you can remove spent flowers to extend the blooming period.

Diseases and pests

This hardy species is rarely affected by pests. Be cautious of stagnant moisture, which can promote fungal rots. In overcrowded, humid conditions, watch for slug damage; good drainage is generally sufficient to prevent problems.

Did you know?

Thyme-leaved sandwort takes its scientific name Arenaria from the Latin 'arena' (sand), as it naturally colonizes sandy and rocky terrain around the Mediterranean. This small, robust herbaceous plant is one of those discreet companions of dry gardens and rock gardens, traditionally cultivated for its undemanding nature and delicate white spring flowers.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.