Acorns were obtained the fall of 2000 from the northernmost known naturally-reproducing population, near Trenton ON, and planted in my back yard.
The spring of 2003, 40 were planted out on a site free of trees, but well endowed with raspberry and a bit of invading buckthorn before clearing. The soil is sandy, but moist in spring. Each was surrounded with a meter-square roofing paper ground cover to suppress competition. By the fall of 2004, 37 remained alive; 11 were growing weakly. By fall 2007, many have reached half a meter in height despite being almost totally overgrown by buckthorn and maple.
a typical tree August 2007