Hi Dan -

This is the source I use

St. Lawrence Nurseries

http://www.sln.potsdam.ny.us/

They specialize in Cold Hardy trees and plants.

The NY State Nursery in Saratoga is really good for conifers - and some other trees - but their hardwood seedlings are very small and young. Many of my oaks from there just didn't make it.

The St Lawrence Nursery in Potsdam is really good for fruit & nut trees. I get grapes, rasberry and a few other plants there too. Its a little more pricey than the State Nursery - but the variety and quality is really good.

Good luck
FH