Curry Leaf

Sowing: Fresh, ripe seed germinates best when sown in autumn, kept at around 68°F (20°C); germination is erratic and can take one to four months. Seedlings can also be transplanted year-round, and the tree may be propagated from root suckers or cuttings.

Siting and water: Curry leaf wants full sun to partial shade, though direct summer sun can sunburn the leaves, and it needs protection from frost in cooler areas. Grow it in well-drained soil and let the soil dry somewhat between waterings, since constantly damp soil promotes root rot; many growers find it more vigorous planted in the ground than kept in a container, though it also succeeds as a potted or indoor plant.

Feeding and shaping: During spring and summer the tree benefits from feeding roughly every five weeks, and regular trimming encourages a steady supply of young leaves and a bushier habit; it can be pruned to size or even kept as a hedge in warm climates.

Curry leaf is a known host of the Asian Citrus Psyllid, an insect linked to citrus greening disease, which is why leaves and plants are restricted from movement across quarantine zones and international borders. Beyond this pest concern, oversaturated soil that stays damp between waterings leads to root rot, and exposure to direct sunlight in hot summer weather can sunburn the foliage.

Harvest: Leaves can be picked at any time for fresh use, and removing whole leaflets or cutting back three to four inches of top growth encourages new side shoots and a bushier plant. Berries may also be plucked off to redirect the plant's energy into leaf production, or left to ripen if fruit is wanted.

Storage: Leaves can be frozen for later use, but drying is not recommended since the leaves lose much of their flavor when dried.

Culinary: Curry leaves are prized fresh, releasing the most flavor when fried in oil, and are used across vegetable, fish, seafood, sauce, marinade, and chutney preparations in Indian, Sri Lankan, Cambodian, and Javanese cooking. During colonial rule in India, the British blended curry leaf with other spices to create commercial curry powder, though curry leaf itself is distinct from that spice blend.

Medicinal: In traditional Indian medicine, curry leaves have been used for diarrhea, dysentery, and to prevent vomiting, while root juice has been used for relief from renal pain, and the leaves, root, and bark have served as a tonic, stomachic, and carminative.

Other: An oil extracted from fresh leaves, sometimes called limbolee oil, has been used to scent soap, and in parts of Southeast Asia the wood of the tree has been burned as fuel.

Curry leaf is native to the moist forests of India and Sri Lanka, where it occurs naturally up to about 1500 meters altitude. From this South Asian homeland it became a staple flavoring in Indian and Sri Lankan cooking and spread into Southeast Asian cuisines, including dishes in Cambodia and Java, and during British colonial rule in India it was incorporated into the spice blends that became known as curry powder.