I was thinking about sowing beets and turnips now in my cold frame. Am I correct that they're cold hardy enough to be okay in the cold frame once the weather turns?
I grow beets all winter long in my coldframes though more for the leaf than the root. I'm not sure if turnips will make it through the winter but they should be good to at least the start of winter.
Turnips, winter/fall radishes are frost tolerant. Though might not grow. But I think in cold frame they can grow too. Then you have to worry more of high temperatures(due to greenhouse effect during sunny mild days.