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This is our Doomsday Onion page. It gives instructions on how many onion plants are needed to feed one person for a year.
There are about 50 calories in about one cup of onions. That is 24 cups on a 1200 calorie diet. Your average size onion should fill at least one cup. So you would need 8760 onions a year.
Let's say you need 9500 onions a year for eating, seed production and trading. You would need about 5000 square feet to grow this many onions.
Onions take about six months to mature, two years for seeds. They can be grown in just about any weather. Some types can be left to overwinter.
Some onions will keep up to six months in a cool, dry storage area. Onions can be dried or canned but it is really not necessary due to the fact that they will keep for a long time.
All of the variety information on the David's Garden Seeds® website, including the days to
maturity, color and size are based on data from tests done at specific
locations. Many factors, including geographic location, daytime and
nighttime temperatures, the availability of plant nutrients, many unknown climate factors and insects/pest interact to determine a variety's
performance. For information on which varieties will perform best in
your area, we recommend that you contact your local county extension agent or a Master Gardener.
David’s Garden Seeds®, gardening is our passion. We provide top quality,
non-GMO seeds so families can learn about gardening and love it. In turn, we
hope they will pass this passion down to their children and
grandchildren, teaching them to grow delicious food, fresh herbs and