Can You Grow Onions in the Winter

It’s a little-known fact that many seasoned gardeners aren’t aware of: you can grow onions (and shallots) in the winter. These super-hardy plants can survive incredibly cold temperatures with a little protection, and provide quality bulbs even after they bolt in the spring.

Can you grow onions over winter?

Here you’ll find our top 10 favourite winter vegetables to grow outdoors or under glass during the colder months of the year. Easy to grow and highly versatile, onions, shallots and garlic lead the way, establishing themselves over winter to produce a delicious crop next summer.

What is too cold for onions?

Onions thrive in a variety of temperature ranges but they produce the best at 55 to 75 F. (12-23 C.) and most varieties are hardy to 20 F. … Cold temperatures will slow down the bulb production, as does the lower light hours in many northern zones.