Italian Basil

Italian Basil is the classic sweet basil of the Mediterranean kitchen, loved for its broad, glossy green leaves with a smooth cupped shape and a warm, sweet aroma carrying soft clove-like and peppery notes. Its full, mellow flavour is what gives traditional pesto, Caprese salad, and fresh tomato dishes their unmistakable character, and the lush leafy plants are handsome enough to earn a place on a sunny balcony or windowsill. This is a warm-season annual that rewards a little heat with abundant, fragrant foliage all season long.

Planting

Italian Basil is a warm-season, frost-sensitive annual, so timing matters. Start seed indoors about 6 to 8 weeks before the last spring frost, or sow and transplant outdoors only once all danger of frost has passed and the soil has warmed — wait until nighttime temperatures stay consistently above 10 C. Sow the seed shallowly, about 0.6 cm deep. Germination usually takes 5 to 10 days and is best at a soil temperature of roughly 18 to 21 C. Once seedlings have developed 2 to 3 pairs of true leaves, thin or transplant them to their final spacing: about 15 to 30 cm apart for full-size plants, or a closer 10 to 20 cm if you are growing for cut leaves, with direct-sown rows about 45 cm apart. Give the plants a spot in full sun with at least 6 to 8 hours of bright light each day. In Egypt the main constraint is cold nights rather than summer heat: start seed in a seedbed or under protection from late January into February, then transplant out in March and April once nights are reliably above 10 C, for a long cutting season from June through October. In the milder Nile Delta avoid sowing into the cold of mid-winter; in warmer Upper Egypt transplanting can begin a few weeks earlier and a second autumn crop is feasible.

Fertilizing

Feed lightly and favour balance over heavy nitrogen. Work in a low-nitrogen starter fertilizer before planting. If growth slows about two months after planting, side-dress with a modest nitrogen feed to keep the plant producing fresh leaves. Basil grown in good garden soil often needs no extra fertilizer at all. For plants in containers, give a diluted balanced liquid feed every 3 to 6 weeks, and avoid high-potassium feeds, which do not suit leafy basil.

Care

Italian Basil is not drought tolerant and needs a fairly constant supply of soil moisture, so keep the soil evenly moist — water deeply about every 7 to 10 days, and more often for container plants. Water at the base of the plant in the morning and avoid wetting the foliage, which helps limit disease. Watch for downy mildew (fluffy growth on leaf undersides), Fusarium wilt, gray mould, and bacterial leaf spot, along with pests such as aphids, slugs and snails, spider mites, and whiteflies; watering at the base rather than overhead is the simplest way to reduce downy mildew. Pinch the terminal shoot tips at least once a week to keep the plant bushy, and pinch out flower buds as they appear, since flowering turns the plant woody and makes the leaves more bitter. For the best flavour, harvest just before flowering, and pick in the cool of the early morning; for a full cut, take the plant back to about 10 to 15 cm above the ground to encourage fresh regrowth.