Wild Thyme

Thymus serpyllum, known as wild thyme or creeping thyme, is a low-growing perennial subshrub with creeping stems reaching 5–15 cm tall. It forms a dense, fragrant mat of small evergreen leaves topped by clusters of lilac to magenta flowers beloved by bees and pollinators. Hardier than common thyme, it tolerates summer drought and winter cold well, thriving in sunny, calcium-rich, free-draining soils. Its flavour is milder than Thymus vulgaris but its medicinal reputation is considerable.

Growing

Start seeds indoors at a soil temperature of at least 15 °C, sowing just 0.2 cm deep into a well-drained seed-starting mix — light aids germination, so barely cover. Germination takes 7–21 days. Grow on under good light for about 6 weeks until seedlings are sturdy. Transplant outdoors once night temperatures stay reliably above 5 °C and frost risk has passed, spacing plants 15–20 cm apart in rows 35 cm apart in a sunny, open position.

Care

Water sparingly once established — wild thyme is drought-tolerant and resents waterlogged conditions. No supplementary feeding is needed on lean, well-drained soils; excess nitrogen produces lush but weakly scented growth. Trim lightly after flowering to keep plants compact and encourage fresh growth. In northern gardens, cover plants with a light mulch of grit or straw before hard frosts, or overwinter in a cool, bright indoor space as a pot plant.

Harvest

Harvest shoot tips from the time plants are actively growing and beginning to flower, when aromatic oil content is highest. Cut back no more than one-third of the plant at a time, using clean scissors. Harvest continues until the first hard frost halts growth. Regular harvesting keeps plants bushy and productive.

In the kitchen

Use fresh or dried leaves and flowering tips to season roasted meats, vegetable dishes, soups, and herbal teas. The flavour is subtler and more floral than common thyme, pairing well with honey-based dressings and lighter dishes. Steep in warm oil or vinegar to create aromatic infusions. The flowers are edible and add a decorative, mildly thyme-scented garnish to salads.

Storing

Dry harvested sprigs in a warm, well-ventilated spot away from direct sunlight; strip and store in an airtight jar for up to 12 months. Alternatively, freeze whole sprigs in sealed bags for up to 6 months. Fresh sprigs keep for up to a week in a glass of water at room temperature or loosely wrapped in the refrigerator.