what kind of soil do hosters like?

Hostas like most soils and a bit of shade too. They are also brilliant for pots in a normal all purpose compost.

Careful of slugs with these plants, the slugs just love the new shoots, lol.

Don't plant in full sun or the markings on the leaves will be bleached out, if your soil is very heavy add a bit of grit.

I have two hostas one in soil which is a bit sandy and one in heavy clay soil which is also very wet in winter, and both of them are thriving, so i suppose they are happy wherever you put them. But remember to put slug pellets down as soon as they come through the soil in spring.

Ooooh, I don't use slug pellets, too much damage to birds and hedgehogs that eat the slugs. The wildlife die a slow and horrible death, :-(

I put ordinary compost in a pot, put sharp small stones round the edges to keep the slugs off, plopped the pot under a tree, and it's doing really well. Mind you, I do also water it well frequently, as hosta's love damp conditions.