Mint in May: monthly care

Mint thrives in full sun or partial shade and tolerates a wide range of soils, including loam, clay, and peat-based types. It prefers consistently moist conditions, so avoid very free-draining or sandy ground. Choose your planting spot carefully: mint is famously invasive, spreading rapidly by underground runners. To contain it, plant in a large pot (at least 30 cm diameter) sunk into the border, or grow it in a dedicated bed where its vigour won't smother neighbouring plants. Plant mint from March to May, once the risk of hard frost has passed. If planting rooted cuttings or young plants, space them 70 cm apart to allow for their eventual spread. Dig a hole slightly larger than the root ball, work in a handful of garden compost to improve moisture retention, and set the plant at the same depth it was growing in its pot. Firm the soil gently around the roots and water thoroughly. If sowing seed, scatter thinly on the surface of moist compost in trays or modules indoors in early spring, as germination can be slow and erratic. Barely cover the seed with a fine layer of compost. Once seedlings are large enough to handle and outdoor temperatures are reliably above 10 °C, harden them off and transplant outdoors at the same 70 cm spacing. Immediately after planting, water generously and keep the soil consistently moist for the first few weeks while roots establish. A 5 cm layer of garden compost or well-rotted manure around the base helps retain moisture and suppress weeds, but keep mulch clear of the stems to prevent rot.

Mint has high water needs and performs best when the soil is kept consistently moist. Water regularly throughout the growing season, especially during dry spells in late spring and summer. In hot weather, check containers daily, as mint in pots can dry out quickly and will rapidly wilt if neglected. Reduce watering frequency in autumn and winter when growth slows, but don't let the soil dry out completely. Feed once in April with a balanced general-purpose fertiliser or a top-dressing of well-rotted compost or pelleted chicken manure. Mint is not a heavy feeder, and excessive nitrogen can produce lush but flavourless foliage, so a single spring application is sufficient. Container-grown plants may benefit from a second, lighter feed in mid-summer if growth appears weak. Mint is fully hardy across zones 3a to 9b and requires no winter protection outdoors. Top growth dies back in late autumn; simply cut it down and allow the roots to overwinter in the soil. Potted mint can stay outside year-round, though in very cold winters you may want to move containers against a sheltered wall to prevent the compost freezing solid. Common pests include mint beetle, whose larvae skeletonise leaves in summer, and aphids, which cluster on shoot tips. Pick off beetles by hand or tolerate minor damage; serious infestations are rare. Rust fungus causes orange pustules on leaves—remove and bin affected foliage promptly and thin congested clumps to improve air circulation. Mint is otherwise trouble-free and requires minimal intervention once established.