Onions will overwinter just fine in your vicinity with no protection. But today isn’t a good planting day for root stuff so you’re good regardless :)
If you have to decide what to protect from a frost or freeze, unless it might get below 10F, your onions will be just fine.
In Vidalia GA they plant them out (seedlings) sometime in Sept/Oct and then harvest next May/June. They don’t grow as much during the cooler temps as they do when temps are above 45F or 50F but they’re totally hardy to frost/freezing temps there.
“If you have to decide what to protect from a frost or freeze, unless it might get below 10F, your onions will be just fine.”
You are a big help to me - if you say it, I listen and learn. Right now the potting soil in the containers where the onions will be planted, is soup due to all the rain. If I planted them, they would float.
I didn’t do anything all winter for the Walking Onions and they were looking terrific before this hit - they had decided it was spring and they were ready to do something. I hope they still look that way but I can’t look today as I have quilts and netting blocking my way to get back there.
Hopefully, tomorrow, I’ll take all the protection off the plants and see what I have. Those four Homemade Pickles cucumbers didn’t look good since I transplanted them, so I have just planted six more seeds in cups under the grow lamp. Although the plants are covered out there, I expect them to be totally flat in their containers.