homegrownbucks
5 year old buck +
Not sure if other states have this, but I thought it was cool. A searchable database for various trees, I looked at persimmons, chestnut and European pear in wi, kinda gives you an idea of what will grow where. American chestnut all the way up to bayfield county!
http://dnr.wi.gov/topic/urbanforests/champion/CTsearch/
http://dnr.wi.gov/topic/urbanforests/champion/CTsearch/