http://www.treeco.biz/plantsgrown.htm
Here is a list of what we grow. We have over 1,000 hosta cultivars growing along with about 400 other trees, shrubs etc. We jsut added a cornus florida cultivar 'Celestrial' today(also know as 'Galaxy'). It is a Cornus kousa X Cornus florida hybrid. It it known for it's prolific white flowers before it's leaves emerge. It was $13 at home depot and 8ft. tall.
http://eppserver.ag.utk.edu/dogwood/.../celestgal.jpg