Ed Thaubald has an extensive selection of hosta liners he offers through a mamajack sale on cubits. all are healthy and he is good to work with on replacements if needed. He also sells direct.
http://www.hostaliners.com/cat...
A friend gets me a Wayside Gardens certificate each year for Christmas. They went downhill after bankruptcy, but have changed their practices. Larger, more limited, and more expensive plants, but the quality this last year was as good as or better than I've seen it in the last five years.
LOVE Santa Rosa, especially when they run their clearances. We have such a long growing season, I can take real advantage of them.
Walters Gardens has had good quality on their clematis and sedums. They are too expensive for me to order direct, but I got them again from a Mamajack sale on cubits.
Lots of good resources.