mike. buckley wrote:
I've just been given 2 massive rhubarb crowns, however I've had
differing advice on what to do with them. Do I leave them to over
winter just sat on the soil, or do I plant them properly when the
first frosts start?
Thanks

I'd plant them now. Most British winters are warm enough to allow
them to start rooting, which is good; I see no real point in leaving
the crowns to get frosted. Bonemeal and lots of muck or compost in
the planting area; and even some newspaper torn into strips dug in at
the bottom of the hole will help, too, as with beans.

If they really are big mature ones, you should divide them, making
sure there are at least two or three good growing points on each
piece.

Mike.