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Also, onions are supposed to repel insect pests.
A "free" way to plant onions is to save the part the roots come from-- you don't eat that anyway-- and plant it. It won't grow a bulb but it will produce a stem that looks like a green onion. Trim and use in cooking. It will keep sprouting. This works with long green onions too; plant the bottom two inches and cook the rest.
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