That's great news. Swelling nodules certainly seem promising. Mine usually seem to return in the spring unless it was a really really cold winter like the 2009/2010 winter. The ones planted closer to the house usually come back better than those planted further out in the yard. I put a lot of mine in the gh so they will be fuller and look nicer earlier on in the season. They seem to really like it in the gh.
~SJN