Onions, planted from seed in full sun and well-draining soil, germinate within 21 days of planting. Harvest time depends on which type of onion is preferred. Scallions, or green onions, should be pulled when the bulbs are 1/2 to 1 inch in diameter, while fully mature onions are ready for harvest when the tops die off, in mid to late autumn.
About this Author
Deborah Waltenburg has been a freelance writer since 2002. In addition to her work for Demand Studios, Waltenburg has written for websites such as Freelance Writerville and Constant Content, and has worked as a ghostwriter for travel/tourism websites and numerous financial/debt reduction blogs.