This is gonna be my first try at onions, Any tips on which sets to buy??
All your advice so far has been great thanks
janmac
For over winter, I found that T&M First Early performed best: every set produced a solid onion with none bolting. But there several other varieties: Radar, Shakespeare, Snowball, Japanese/Senshyu or Electric which is a red onion. You could visit a garden centre which do pick your own and plant a mixture. The Japanese onions are very popular. Good luck.
I've had excellent results with Electric, they're in our local "pound shop" this year, 50 sets for 99p!