Creeping thyme

Sun

Full sun; flowering and mat density decline in shade.

Water

Water regularly while establishing, letting the surface dry between waterings. Established plants need little extra water except during prolonged drought, especially in containers.

Soil

Poor to moderately fertile, sharply drained sandy, gritty or stony soil. Tolerates neutral to alkaline conditions; wet winter soil is a greater problem than low fertility.

Height

0.15-0.3 ft (0.05-0.1 m)

Spread

1-2 ft (0.3-0.6 m)

Flowers

Early to midsummer, sometimes continuing later; small pink to purple flowers in rounded clusters.

Foliage

Evergreen. Tiny, aromatic green leaves on creeping stems; foliage may bronze or become sparse in cold winters.

Growth

Moderate; creeping stems root where they touch suitable soil.

Care needed

Low

• Water new plants through their first growing season, allowing the soil surface to dry between soakings.
• Avoid routine feeding; rich soil and high-nitrogen fertiliser encourage loose, weak growth.
• Use a thin gravel mulch rather than moisture-holding organic mulch around the stems.
• Remove weeds by hand before they become rooted through the mat.
• Divide or replace sections when the centre becomes bare, and keep foot traffic occasional.

Pruning. Lightly shear after flowering to remove spent blooms and keep the mat compact, leaving green growth on every stem. In spring, trim out dead sections rather than cutting the whole plant into bare old wood.

Early spring

Check for winter dieback and remove dead stems once new growth is visible.

Spring

Plant or divide into free-draining soil, then water until roots establish.

Early summer

Hand-weed gaps and water young plants during dry spells.

After summer flowering

Lightly shear spent flowers and trim stems spreading beyond their allotted space.

Late summer

Take non-flowering shoot cuttings or lift rooted pieces to fill bare patches.

Autumn

Clear fallen leaves from the mat and check that rainwater drains away freely.

• Plant between widely spaced stepping stones to soften hard edges and release scent when brushed.
• Use as a low carpet at the front of sunny gravel borders with lavender and small alliums.
• Let it trail over low retaining walls or rock-garden ledges for a soft flowering edge.
• Use small patches as a lawn alternative in sunny, dry areas that receive little foot traffic.

Garden styles it suits: Dry gravel garden, Alpine rock garden, Cottage garden, Mediterranean, Pollinator garden and Sensory garden.

Plant it with: Lavender, Rock rose, Dianthus, Dwarf alliums, Low-growing sedums and Blue fescue.

Wildlife: Flowers provide nectar and pollen for bees and other pollinating insects. Avoid placing flowering mats where bare feet will regularly pass.

• Root and crown rot in wet soil: improve drainage, keep organic mulch away from stems and replace badly affected plants.
• Bare or woody centres: divide healthy outer sections and replant; avoid cutting back into leafless old stems.
• Sparse growth and few flowers in shade: move plants to a sunnier position.
• Winter dieback in cold, wet conditions: clear leaf litter, improve drainage and remove dead growth in spring.

Not known to be toxic to cats, dogs, horses or people; the leaves and flowers are edible in small culinary quantities. Concentrated thyme essential oil is not equivalent to the garden plant and can be harmful if swallowed, particularly by pets.

• Mother of thyme (Thymus praecox)

  Another mat-forming thyme, often with rounder, hairier leaves. The species overlap in appearance and are frequently sold under the same common names; a reliable botanical label is more useful than flower colour.

• Common thyme (Thymus vulgaris)

  Forms a small upright woody shrub rather than a flat, rooting mat, with narrower grey-green leaves whose edges usually roll underneath.

The common name describes its creeping stems, while serpyllum comes from the ancient Greek name herpyllos for creeping thyme.

Propagation. Divide rooted mats in spring or take non-flowering shoot cuttings in summer. Rooted creeping stems can also be lifted and replanted. Seed is an option for the species, but named cultivars may not come true.

Accepted botanical name

Thymus serpyllum

Native range

Austria, Baltic States, Belarus, Belgium, Buryatiya, Central European Rus, Czechoslovakia, Denmark, East European Russia, Finland, France and Germany.

Measured

Soil pH 5 to 5.5. Average height 6 cm.

Sources: GBIF (CC BY 4.0) and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.