How to Grow Mint

Overview

Mint is one of the easiest herbs to grow and is available in many delicious varieties, from classic spearmint to chocolate mint and apple mint. It is a vigorous perennial that spreads readily by underground runners, so containment is essential. A single plant can provide more mint than most households can use.

Health Benefits

May aid digestion: Mint has been traditionally used for centuries to soothe the stomach and support healthy digestion. A cup of homegrown mint tea is a gentle, natural remedy.

Menthol for congestion relief: The menthol in mint may help open airways and ease congestion, making it a comforting herb during cold and flu season.

Vitamin A and rosmarinic acid: Mint is a source of Vitamin A and contains rosmarinic acid, an antioxidant compound that may help reduce inflammation and support respiratory health.

Soil Preparation

Mint tolerates a wide range of soil conditions but prefers moist, fertile soil in partial shade to full sun. It grows vigorously in most situations, including heavy clay and damp ground. The ideal pH is 6.0 to 7.0. Because of its invasive nature, most gardeners grow mint in containers or sink a pot into the ground to restrict the roots.

Sowing & Planting

Mint is best propagated from cuttings, divisions, or bought plants rather than from seed, as seed-grown plants are variable in flavour. Plant from March to May, spacing 30cm apart or placing one plant per 30cm pot. Sink containers into the ground with the rim 2cm above soil level to prevent runners escaping. Repot every couple of years as the roots become congested.

Care & Maintenance

Water regularly, as mint prefers consistently moist soil. Cut plants back to ground level after flowering in late summer to encourage a fresh flush of new leaves. Feed container-grown mint monthly with a balanced liquid fertiliser during the growing season. Divide plants every 2-3 years to maintain vigour.

Harvesting

Pick sprigs and leaves as needed from April to October, taking from the tips to encourage bushy growth. Mint leaves are most aromatic just before the plant flowers. For preserving, dry leaves or freeze them in ice cube trays with water. Mint is best used fresh for the most vibrant flavour.

Common Problems

Rust appears as orange-brown spots on leaves and stems. Cut affected plants down to ground level and destroy the foliage. New growth is usually clean.

Mint beetle is a small, shiny green beetle that eats holes in leaves. Pick off by hand and check regularly.

Invasive spreading is the main management issue. Always grow in containers or with root barriers to prevent it taking over the garden.

Companion Planting

Mint is a useful companion for tomatoes and cabbages, as its strong scent can help repel flea beetles and aphids. Mint has no significant plants to avoid, but should be contained so it does not crowd out neighbouring plants.