I don't know where you are, but Osage Orange grew in northern Illinois, and we also have a tree here in south Texas. So it covers quite a range and withstands all sorts of temperature ranges.
But I never would have mistaken osage orange for walnut!! Samala, Renee -------Original Message------- Thanks for this link, Polo! You've made me want to get a sapling next spring and see if it could survive up here. We got a red-bud which is thriving, so perhaps.