Jun 10, 2026 / By Anas Heaba / in Growing Guides
Onion is one of the most rewarding cool-season crops you can grow in an Egyptian garden. Get the variety and timing right and you will harvest firm, well-cured bulbs that store for months. This guide walks you through every step, adapted to Egypt's mild winter and low latitude.
Onion is a cool-season crop, which makes it a perfect fit for Egypt's mild winter (roughly November to February) and lets you avoid the scorching summer. The catch is daylength: bulb formation is triggered by how long the days are, and the critical daylength runs from about 11 to 16 hours depending on the variety. Because Egypt sits at a low latitude (around 22-31 N), you must use short-day varieties that begin bulbing at only about 11-12 hours of daylight. Long-day temperate onions would just grow leaves here and never form a bulb, so matching the variety to our latitude is the single most important decision you will make.
The practical Egyptian method is to raise seedlings in a nursery first, then transplant. Sow seed in a nursery bed in autumn (mid-September to mid-October), then move the pencil-thick seedlings to their final beds around mid-November, about 30-35 days after sowing (up to 6-8 weeks in some systems). Egyptian research at Shandaweel found the best yields when short-day transplants went out on 15 November, and that an October sowing gave firmer, higher-quality bulbs than a September sowing. In the cooler Nile Delta, keep to this October-November transplanting window and harvest from March to May. In warmer Upper Egypt, the same mid-November transplanting works but maturity tends to run a few weeks earlier, so do not delay sowing too late or bulbing may clash with rising spring heat.
In the nursery, sow seed about 1.3 cm (1/2 inch) deep; aim for soil at 15-25 C for germination. Seedlings emerge in about 2-3 weeks, and the nursery period from sowing to transplanting is roughly 30-35 days. Transplant when seedlings are pencil-thick, setting them about 5 cm (2 inches) deep. Space plants 7.6-10 cm (3-4 inches) apart in rows 20-46 cm (8-18 inches) apart. Wider in-row spacing (up to about 15 cm) gives larger bulbs, while closer spacing yields smaller bulbs. Onions need full sun and a well-drained bed, soil onions are sensitive to salinity, which matters in parts of the Delta, so use good-quality irrigation water.
Onions like a soil pH of 6.0-7.0 and plenty of organic matter. Before planting, work fertilizer into the top 15 cm and apply phosphorus and potassium according to a soil test. Then side-dress with nitrogen during the vegetative winter growth, for a home garden, roughly 0.5 lb of actual nitrogen per 9 sq m, split into one or two applications during the season. The golden rule: stop nitrogen once bulbing begins in late winter, because excess nitrogen delays bulb maturity and gives soft bulbs.
Keep the soil consistently moist, near field capacity, giving about 2.5 cm (1 inch) of water per week and wetting to roughly 30 cm depth. Over the season onions need about 350-550 mm of water. They are most sensitive to drought at transplanting and during bulb enlargement (about 60 days after transplanting), so never let them dry out then. Thin any direct-seeded onions to 7.6-10 cm apart before they crowd or begin to bulb. Watch for onion thrips and onion maggot, and for diseases such as neck rot, downy mildew, purple blotch and white rot; avoid excess nitrogen and rotate crops to keep disease pressure low.
Stop watering once the bulbs reach full size and the tops start to fall. Harvest when about half the tops have fallen over and dried, the necks soften, and papery outer skins have formed, in Egypt this is usually from March to May. Yellowing, toppling foliage is your signal that the crop is mature and ready to lift and cure.
Start with a short-day variety bred for our latitude. At tna W rna you can pick up red sugar onion seeds for a sweet, mild crop, or golden onion seeds if you prefer the classic storing type. If you would rather skip the nursery stage, you can also browse our fresh red onion and yellow onion. Choose your variety, sow in autumn, and you will be lifting your own cured bulbs by spring.
Jun 16, 2026 by Anas Heaba
Jun 16, 2026 by Anas Heaba
