I would have to do a research on your area, or you can do it by googling your zone, and state, i usually add in the city as well, since i get a better and closer matching selection for the area
You may have had the wrong type of walnut for your area. Now peaches have to go through a stratification process before they will germinate, and they do not do so well in some areas. Pear, usually takes the place of peaches