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I planted onion sets the
I planted onion sets the first week in June. Red and yellow onions. it is now August. They have grown quite well as far as I can tell. However they are more like giant green onions. They have not gotten any big bulbs on the bottom. The necks are an inch or so around. What do I do to have them get a big bulb like they are supposed to be and not so big of a top?