Almost every gardener I know buys onion starts in the spring and gets them in the ground as much as a month before the first frost. It’s true that some of our friends living in more moderate climes will stick onions starts, if they can find (or grow them) in the ground in the fall, mulch heavily, and keep their fingers crossed. My experience tells me that onions don’t do well with hard freezes and that making it through the winter depends on luck and how well insulated you can keep the young plants.
I’ve also known a gardener or two who go to the trouble to start their own onion seed, both indoors and out. The reason they do this is selection. While most nurseries carry only a few (if more than one) types of onions ready as sets, buying seed allows you to choose your favorite tasting varieties, often not available as set. And it gives you a chance to make sure you have the right onion for your location on the planet. (more…)