I would like to add a couple of tips that George
didn't suggest that may be useful for hosta gardeners facing
4) Prune the roots of the trees that may be
competing with your hostas. Take a sharpe spade and push it into the ground
making a circle around your hostas about one foot away from the edge of the
hostas rhizome. At this distance there should be no hosta roots but any tree
roots in this area and at this depth would be severed. If your trees are healthy
and you can make a larger circle it would help the hostas even more. This should
repeated at least every year.
5) Use water absorbing polymers and work them into
the ground when you plant your new hostas. I was at Bob Kuk's two summers ago
and he swears by them.