You can do it now ... it’ll set them back a bit and you’ll need to prepare a really good spot, keep a really good eye on them and ensure they get loads of water. I don’t think they’ll look like a settled clump this season ... the shape will be wrong ... I wouldn’t do it at this time of year unless there’s a really good reason.
Thanks very much for the advice - have been out and now have 14 decent sized hostas potted up. The daddy hosta was getting swamped by other plants. Now....wear to put them?!
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Not ideal, but doable, so yes, totally agree with @Dovefromabove
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.