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Here's how to grow onions in your own garden, including growing onions from seed and growing from food scraps, and when to pick them in the spring.
Allium giganteum, common name giant onion or giant leek, is an Asian species of onion, native to central and southwestern Asia but cultivated in many countries as a flowering garden plant. [ 4 ] [ 5 ] It is the tallest species of Allium in common cultivation, growing to 1.5 metres (4.9 ft).
Because onions can take more than 5–6 months to reach maturity, many growers with shorter growing windows prefer to grow onions from starter bulbs rather than seed. Onion seeds are cultivated in the spring and the resultant bulbs are harvested in autumn. These bulbs are similar in appearance to the mature onion, but much smaller in size.
Leeks must be grown in soil that is loose and drained well; they can be grown in the same regions where onions can be grown. [8] Leeks may be seeded directly, but are more typically sown at high density in seed-beds before being transplanted into the field. This happens at 12 weeks, when they have reached the thickness of a pencil. [9]
Onions are a cool-weather crop and can be grown in USDA zones 3 to 9. [67] Hot temperatures or other stressful conditions cause them to "bolt", meaning that a flower stem begins to grow. [68] Onions are grown from seeds or from partially grown bulbs called "sets" or starter bulbs. Onion seeds are short-lived and fresh seeds germinate more ...
Position the seeds about 2 to 3 inches apart, or speed up planting by blending the carrot seeds with fine sand or potting mix and sprinkling the mixture lightly and evenly along a planting row.