Basil

Basil is a tender annual herb in the mint family, prized for its intensely aromatic leaves in varieties ranging from classic Genovese to cinnamon and lemon-scented types. Native to tropical regions, it demands warmth and wilts at the first sign of cold. Plants grow 40–50 cm tall, branching vigorously when regularly harvested. It thrives in full sun with well-drained soil and is equally at home in containers and open ground.

Growing

Sow seeds very shallowly — 0.2 cm deep — indoors under warmth (soil temperature at least 18 °C) six weeks before transplanting outside. Germination takes 5–15 days. Prick out seedlings once they have two true leaves and pot on individually. Harden off gradually and transplant only once night temperatures stay reliably above 10 °C and all frost risk has passed. Space plants 25 cm apart in rows 25–30 cm apart. Basil is light-germinant, so do not cover seeds heavily — a thin dusting of compost or vermiculite is sufficient.

Care

Water consistently at the base, keeping soil evenly moist but never waterlogged; wet foliage invites fungal disease. Feed every two weeks with a balanced liquid fertiliser once plants are established. Pinch out flower buds as soon as they appear to redirect energy into leaf production and prevent bitterness. Top-dress container plants with compost mid-season. Protect from draughts and temperatures below 10 °C — even brief cold exposure causes blackening of leaves.

Harvest

Begin harvesting when plants have at least six pairs of leaves. Pinch or cut stems just above a leaf node to trigger two new shoots at each cut point. Harvest entire stems for larger yields or pick individual leaves for immediate use. Leaves are at peak flavour just before flower buds open fully. The plant can be cut back by up to half several times through the growing period, delivering multiple flushes of fresh growth over a 60-day harvest window.

In the kitchen

Use fresh basil leaves torn or chiffonaded into pasta, salads, and pizzas — heat destroys the volatile oils, so add at the last moment. Blend with olive oil, pine nuts, Parmesan, and garlic for classic pesto. Genovese types excel in Italian cooking; lemon basil suits Southeast Asian dishes and dressings; cinnamon basil pairs with fruit salads and herbal teas. Flowers are edible and make a delicate garnish.

Storing

Fresh basil is best used immediately. To keep sprigs for up to a week, stand them upright in a glass of water at room temperature, away from cold draughts — do not refrigerate, as cold blackens the leaves. For longer storage, blend leaves with olive oil and freeze in ice-cube trays; cubes keep for up to six months. Alternatively, dry leaves at low heat and store in an airtight jar in a dark cupboard for up to one year, though flavour diminishes noticeably.