I think I figured out what happened.
I had to cover the seedlings because the weather got REALLY cold and I wasn’t sure they’d make it, and probably bent them over.
Them bending over signals to them to stop growing. Well, I still have a bunch of the red ones left from last year and I guess I’ll grab the smallest of them and plant them to save the seed instead of buying them again this year.
Sounds like you’ve come up with a great solution. The red sets/plants that we sold @ Jung’s that were the best for storage were called ‘Redwing.’
I remember Gary growing them out one season and he, too, had onions well into the following spring. He hung them in his unheated garage and took one as he needed it. If an onion can keep well in a garage through a Wisconsin Winter, it’s a winner. :)
“(105-120 Day) The longest-keeping red storage onion. Bulbs store nearly as well as Patterson Hybrid. The glossy dark red, 3 to 4 inch, globe-shaped onions are moderately pungent, very firm and have good skin retention. Tops grow upright and strong. Enjoy them cooked or fresh all winter. Long-day.”
https://www.jungseed.com/product/J02755/551
‘Long day’ means they can be grown in the north.