First a friend called round with a hosta. Compared to the ones on offer in garden centres, this is huge! We have such a lot of problems with slugs and snails that I think I'll keep it in the pot, raised slightly on bricks and hide slug pellets underneath.
Then I saw day lily roots being offered on Freecycle - and only a short way down the road, on the way to the allotment. This was huge clump of roots that I didn't think to photograph till I'd planted most of them! This is maybe a third of them. I've spread them out in different places around the garden so hopefully one spot at least will suit them.