Thyme in August: monthly care

Thyme benefits from light pruning twice a year to maintain a compact, bushy shape and prevent the plant from becoming woody and leggy. Prune in April and again in August, using clean, sharp secateurs or garden shears. In April, as new growth begins to emerge, trim back the previous year's growth by about one-third. Cut just above fresh green shoots, avoiding cutting into old, bare, woody stems, as thyme is reluctant to regenerate from very old wood. This spring prune encourages dense, leafy growth and helps the plant stay neat and productive throughout the growing season. The second prune in August should be lighter. After the main flowering period has finished, trim off the spent flower heads and the top few centimetres of soft growth. This tidies the plant, prevents it from self-seeding everywhere, and stimulates a fresh flush of aromatic foliage before autumn. Again, avoid cutting back hard into woody stems. If you harvest thyme regularly for cooking throughout the growing season—particularly from May to September—you may find that pruning is less necessary, as picking naturally keeps the plant compact. However, even well-harvested plants benefit from a spring tidy-up. Neglected or very old thyme plants that have become sparse and woody in the centre are difficult to rejuvenate. If your thyme reaches this stage, it's often easier to replace it with a young plant or take softwood cuttings in early summer to propagate fresh stock.

Thyme is a low-maintenance herb once established, requiring minimal intervention. Its water needs are low; in fact, overwatering is the most common cause of failure. Water sparingly during prolonged dry spells in the first growing season, but once the roots are established, thyme tolerates drought well and rarely needs watering except in containers. In pots, allow the compost to dry out between waterings and ensure excellent drainage to prevent root rot. Feeding is not necessary. Thyme naturally grows in poor, stony soils in the Mediterranean and actually produces more flavourful, aromatic foliage when grown lean. Avoid fertilisers, which encourage soft, sappy growth prone to winter damage and reduce the concentration of essential oils that give thyme its flavour and scent. Thyme is evergreen and fully hardy in zones 5a–9b, so it requires no special protection over winter in our climate. However, it dislikes sitting in cold, wet soil during winter, so ensure drainage remains good. A gravel mulch helps. In very exposed sites or heavy clay, consider growing thyme in containers that can be moved to a sheltered spot if necessary. Pests are rarely a problem, though thyme can occasionally suffer from root rot (Phytophthora) in waterlogged conditions—prevent this with good drainage. Aphids may appear on soft new growth in spring; wash them off with water or tolerate them, as they seldom cause lasting harm. Harvest leaves and sprigs freely from May to September. Thyme's flavour is strongest just before flowering in early summer, but you can pick year-round as needed, as it remains evergreen.

Thyme is a low-maintenance herb once established, requiring minimal intervention. Its water needs are low; in fact, overwatering is the most common cause of failure. Water sparingly during prolonged dry spells in the first growing season, but once the roots are established, thyme tolerates drought well and rarely needs watering except in containers. In pots, allow the compost to dry out between waterings and ensure excellent drainage to prevent root rot. Feeding is not necessary. Thyme naturally grows in poor, stony soils in the Mediterranean and actually produces more flavourful, aromatic foliage when grown lean. Avoid fertilisers, which encourage soft, sappy growth prone to winter damage and reduce the concentration of essential oils that give thyme its flavour and scent. Thyme is evergreen and fully hardy in zones 5a–9b, so it requires no special protection over winter in our climate. However, it dislikes sitting in cold, wet soil during winter, so ensure drainage remains good. A gravel mulch helps. In very exposed sites or heavy clay, consider growing thyme in containers that can be moved to a sheltered spot if necessary. Pests are rarely a problem, though thyme can occasionally suffer from root rot (Phytophthora) in waterlogged conditions—prevent this with good drainage. Aphids may appear on soft new growth in spring; wash them off with water or tolerate them, as they seldom cause lasting harm. Harvest leaves and sprigs freely from May to September. Thyme's flavour is strongest just before flowering in early summer, but you can pick year-round as needed, as it remains evergreen.