![]() Curing decreases the incidence of neck rot, reduces water loss during storage, prevents microbial infection, and is desirable for development of good scale color. Harvest when the weather is dry.Ĭure onions at 65 - 85☏ at 70% humidity. ![]() Pulling onions too green will make them difficult to cure and will affect storing them. It is likely the outer skins will loosen. Wait until all the leaves are dead and dry. Pull the bulbs by hand or use equipment such as a potato digger or undercutter to cut the roots and lift the bulbs. ![]() Onions are ready to harvest when tops approximately have 50 - 75% fallen over and the skins have dried. Long day onions should be planted in northern latitudes because of daylight requirements for bulbing. Keep direct seeded onions away from onion sets because onion sets are more prone to disease. Onions are shallow rooted and grow best in moist soil irrigation may be required. Keep onions well weeded with shallow cultivation. Plant long day onions in the northern latitudes. Use pelleted seed if direct seeding to help achieve better singulation. If transplanting seed in flats in late February to mid March, tops may be clipped to 5” tall. Seeding depth should be approximately ¼” deep. Sow seed 2” apart and thin to 3 - 4” apart for larger onions. Use pelleted seed if direct seeding to help achieve better singulation.īulb Onions/Long Day - Direct seed long day onions as soon as soil allows in April or early May. Use pelleted seed if direct seeding to help achieve better singulation.īulb Onions/Intermediate Day - Direct seed intermediate day onions as soon as soil allows in April or early May. In order to grow short day onions in the northern region of the United States the seed has to be sown in greenhouses and then transplanted into the field. Plant seed ¼” deep and approximately ½” apart.īulb Onions/Short Day - Typically short day onions are direct seeded in the southern region of the United States. In-row spacing also varies depending upon variety, desired bulb size, between row spacing, soil type, and other management considerations.īunching Onions - Direct seed in spring when the soil reaches 50☏. Between-row spacing varies considerably depending upon weed and foliar disease management, seeder capability, and harvesting equipment. Planting occurs from late March through early May. Transplants are sometimes used to improve bulb size, as well as to hasten maturity, or to avoid infection by some plant diseases, but this method of crop establishment is more expensive. ![]() Onions are mostly direct seeded in the field, although some are transplanted as seedlings or sets. ![]()
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