General Requirements · Onion requires cool conditions during vegetative growth and hot, dry conditions nearing maturity, in early summer. Optimum temperatures for growth are 12ºC to 24ºC, with minimum temperatures of 7ºC and maximum 29ºC. · Popular Onion varieties are Texas Grano, Red creole and Caledon Globe. · A well-managed Onion crop should yield 750 to 1000 x 10kg pockets/ Lima. Land Preparation/ Soil Type · Deep well-drained Sandy to loamy soils with a pH range from 5 to 6.5 is ideal for Onion. · Effective rooting depth is 20cm. · Plough and disc to 45 to 60cm depth of fine tilth seedbed. Planting and Transplanting · Sow directly by drilling in farrows 5mm deep or raise seedlings in nursery beds and transplant 4 to 5 weeks later. Ideal sowing time is February to June. · Transplant during the cool part of the day (early morning or late afternoon) to avoid wilting of the plants. ·
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