I’d just pot them up in multi purpose compost and pop them somewhere sheltered. A cold frame is ideal but up against a house wall should be ok. Keep them just moist.
jill15 I'd echo the last post. My (established) rhubarb is in the ground where it always is, absorbing all the goodies I heaped on it as it died back in September, so I can't see why yours shouldn't go in? I'd plant it a good 12-18 inches deep with as much 'food' as you can source so that it can develop a bit of energy to start spring growth. To me, you're reducing its chances?
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Hope you have plenty of room for the ones you've bought
Much as I like it, I don't grow it here in this garden, because I'd have to create a fair bit of space for it somewhere which would be tricky.
I live in west central Scotland - not where that photo is...
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.