大葱春、秋两季均可进行播种育苗，但以春季育苗为佳。秋季育苗，对播种知要求非常严格，一般以封冻时鳞茎尚未充分形成，不致诱导成花而发生先期抽更为原则。秋季育苗播期过早，越冬前幼苗长到4个真叶以上，葱的基部径粗大于4。，苗高大于12。时，葱苗就会通过春化阶段，造成 Spring onions, autumn seasons can be seeding nursery, nursery spring seeding is better. Growing seedlings in autumn, the sowing requirements are very strict, usually when the bulbs have not yet been fully formed when frozen, will not induce into flowers and pre-pumping more principle. Seedling sowing in autumn is too early, before the winter seedlings grow to 4 true leaves above the onion base diameter greater than 4. , Seedling height greater than 12. When the onion seedlings will be through the vernalization stage, resulting