I recently purchased some onion plants from gurneys. Here in Ohio the temps have been about 10-15 degrees below normal. I'm in growing zone 6. When I received my plants, I called them to make sure it was still safe to plant with the colder temps. They said they will be fine but I'm starting to wonder. Night time temps have been in the low to mid 20's. I placed some mulch around the bulbs and I'm certain they did not freeze. But the top green part of the plants were certainly exposed to the cold. Since planting almost a week ago they have become quite yellow and several have fallen over. Can anyone tell me if they will still grow once warmer, or should I consider replanting more in a week when temps are more normal. I don't want to wait to find out first hand, only to have it be too late to plant new ones. Thanks for any help!

My experience has been that if I plant plants, the tops die and a new top grows. So now I only plant bulbs (they're cheaper) and I do it in the Fall, although many people in my area plant in the spring. But I want to get them planted before the ground freezes solid as I never can figure out when to plant in the spring. Its a personal problem.

Mine have been a couple inches tall for a couple months now and they look fine. They have survived nights with temperatures in the teens and a couple feet of snow.

I think your onions are fine but, if you want to make sure, dig one up and check the bulb. It should be hard and smooth, not mushy. More important, did you plant the right kind of onion for your area?

https://garden.org/learn/artic...

Yes I did plant the right variety. It's a "candy" variety. I planted them last year and had tons of 5-6" bulbs by mid summer. I wish I had kept some better notes from last year. I know it wasn't this cold at planting time but I also recall we had some very cold nights a few weeks later.