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Onions are easy to grow, have a fairly short growing period and take up little space in the garden. If you don’t have a vegetable garden, plant a few onions in your flower garden or in a pot or box and set them on your patio or in a sunny window. Plant onions 1/4 inch deep and 3 to 4 inches apart in double rows, leaving 6 to 10 inches between rows. If the onions are planted closer together, you can harvest every other plant as a green onion so that bulb development of the remaining plants is not impeded.  How to Grow Organic Onions from Seed »