Ed ex@directory wrote:
However I find that, come the spring, a lot of them are lost. And those
that remain and thrive well are not much earlier for cropping than my
main crop onions sets that I plant out at the usual time.

I feel that they offer little advantage and that I might be better off
saving the space that they would occupy to plant out more of the regular
sets around about April time.

What are other peoples' experience here with over winter onions?

Our experience was pretty much the same as yours, although I think the bed
we used had a proneness to white rot that we hadn't realised. May try again
this year in a different area.