Seeds (Cucurbita pepo)

Zucchini (Cucurbita pepo) is the classic summer squash: a vigorous, fast-growing plant that rewards a little warmth with a long run of tender, mild-flavoured fruits. The young courgettes have smooth skin and a soft, delicate flesh that cooks quickly, which is exactly why they shine grilled, sauteed, folded into fritters, or hollowed out and stuffed. Picked small and tender before the seeds enlarge and the skin hardens, they stay sweet and fine-textured rather than watery and tough, making this one of the most generous and forgiving crops you can raise at home.

Planting

This is a warm-season, frost-sensitive crop, so timing is everything. Sow outdoors only after all danger of frost has passed and the soil has warmed; aim for soil at least around 21°C at a depth of 5 cm. For germination the seed wants warmth of 18-21°C, and in warm soil it sprouts quickly, usually in about 5-7 days. Sow about 1.3-2.5 cm deep: roughly 1.3 cm in pots and about 2.5 cm when sowing directly into the ground. You can also start indoors about three weeks before transplanting, using small pots, then harden the young plants off before planting them out. Give every plant full sun, ideally 6-10 hours of direct light a day in a warm, sheltered spot. These plants grow large and vigorous, so leave generous room: around 90 cm between plants, or roughly 45-90 cm apart in rows about 1.8 m apart. Sow a few seeds per station and thin to the strongest seedling, spacing survivors about 20-30 cm apart; snip the extras off at soil level with scissors rather than pulling, so you do not disturb the roots of the one you keep.

In Egypt: there is no real frost risk across most of the Nile Valley and Delta, so the goal is matching warm-but-not-extreme temperatures rather than avoiding frost. In the Delta and Lower Egypt (Cairo, Alexandria, Delta governorates), sow a main spring crop in February-March as the soil warms, and an autumn crop in August-September for an October-November harvest; midsummer sowing is possible but is the least favourable window because heat and disease pressure peak. In Upper Egypt and the warmer south (Luxor, Aswan, Asyut), shift earlier with a January-February sowing for a harvest before the intense summer, and favour a September sowing for a cooler-season crop. Protected cultivation in a greenhouse or tunnel can extend the season into winter anywhere in Egypt.

Fertilizing

Zucchini are hungry feeders that do best in fertile, well-drained soil, so dig in plenty of compost or fertilizer before planting. They prefer slightly acidic ground, around pH 6.0-6.5 (a range of 5.8-6.8 is fine). Once growth is under way, side-dress the plants: a nitrogen feed when the vines begin to spread, or when the first female flowers start to appear, keeps them productive. Plants growing in good garden soil generally need no extra feeding, but container-grown plants benefit from a high-potash liquid feed every 10-14 days once the first fruits begin to swell.

Care

Water is the single biggest factor in plump, tender fruit, as zucchini are thirsty and use a lot of it. Provide about 2.5 cm of water per week from rain or irrigation, and in hot weather plants may need watering every day. Drip lines or soaker hoses are ideal because keeping the foliage dry helps fend off powdery mildew, the main fungal problem you are likely to meet; downy mildew, viruses, anthracnose, angular leaf spot, bacterial wilt, and grey mould can also appear. Watch for the common pests too: squash vine borers, squash bugs, striped and spotted cucumber beetles (which can spread bacterial wilt), and slugs and snails on young plants. The reward comes fast, since zucchini matures in roughly 50-65 days from transplanting. Harvest young and tender, before the seeds enlarge and the skin hardens, picking when fruits are about 10-20 cm long. Crucially, harvest often, 2-3 times a week, because frequent picking keeps the plant cropping heavily.