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Corn mint

Mentha arvensis · Lamiaceae

The gardener's calendar

The right move for September

Ideal time to plant corn mint: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

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ID card

Foliage
Deciduous, light to medium green
Flowering
July to September, lilac or purple flowers
Adult size
30 to 60 cm in height
Growth
Fast
Hardiness
Very hardy (down to -20 °C)
Origin
Temperate Europe, Asia
Soil type
Moist and rich soils, tolerates waterlogged conditions
Light requirements
Sun to partial shade

Care

Watering

Field mint appreciates constantly moist, even waterlogged soil. Water regularly during the growing season, especially in dry weather. In pots, make sure the substrate never dries out completely. In winter, reduce watering but don't let the soil dry out entirely.

Exposure

Place field mint in sun or partial shade. It tolerates partial shade well and may even prefer it in hot, dry climates. A sunny exposure promotes better concentration of essential oils.

Pruning and harvesting

Prune the stems regularly to encourage bushy, dense growth. Pinch out the tips in spring and early summer. You can cut the stems above a pair of leaves to harvest fresh foliage without exhausting the plant.

Soil and substrate

This mint adapts to most soils but prefers rich, organic soil that is well-drained while remaining moist. In pots, use quality substrate mixed with leaf mould. It tolerates slight acidity as well as alkalinity.

Fertilizer

A balanced fertilizer application in spring and early summer is sufficient. Well-decomposed compost or diluted organic fertilizer will promote lovely growth. Avoid excess nitrogen which would dilute the aromas.

Diseases and pests

Field mint is generally robust. Watch out for powdery mildew and rust in overly humid, enclosed conditions. Good air circulation and watering at the base reduce risks. Aphids rarely appear; a spray of water is usually enough.

Did you know?

Field mint was widely used in the Middle Ages as a medicinal and aromatic plant throughout Europe. It also played an important role in monastic gardens, where it was cultivated for its digestive properties. Its volatile and persistent scent also made it a natural repellent against rodents and unwanted insects.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.