I have an onion question. I live In ohio in zone 5b. If I plant onion bulbs or sets now will I get onions in the fall or do I plant them in fall for spring onions? Or maybe I can do both.

I guess I am alittle confused with this fall planting. Is it more to plant in fall for spring crops or plant in fall and still get fall crops? Sorry if that sounds dumb.

I was thinking about cabbage, cauliflower, onions and maybe radishes. Thanks in advance!