Pawpaw do well for me in Colorado Springs. I am in a protected area near the mountains. This helps the pawpaw avoid the worst hail and wind damage we occasionally receive. My soil is near neutral pH and is mostly clay. I add lots of organic matter yearly with plenty of fall leaves which I leave on to decay naturally. I water 1-2 times a week in the growing season. When it is extremely dry or hot I water a bit more. Sometimes a few leaves on the trees get a bit of scorch from sun and dry air but not much. They seem to be happy with the 160 day growing season and the get enough heat or growing degrees to mature fruit and wood perfectly. I can say from observation that they will do well anywhere peaches can grow, and probably a few places too cold for peaches in winter. They have been amazingly easy to grow. Deer do not bother them, and while squirrels have eaten them, they seem to like other fruit much more. I love my pawpaws. They are my most recent favorite fruit to grow. I do hand pollinate them when they bloom. They bloom later than peaches, plums and apples and escape late snows and freezes. In winter, they do not mind widely fluxuating temperatures. Their wood is weaker and more brittle than most fruit trees so I grow mine in between peach trees. This gives them part shade and a little branch support. I have NC-1, Wells, Taytoo, and some unknown trees from Michigan. I also have new trees of Shenandoah and Susquehanna from Forest Keeling. Just ordered several from England's: Kentucky Champ.,Summer Delight, Halvin and Prima 1216 so will have quite a collection. Since they do not need near as much sun as other fruit trees, they can go in more shady locations. I also think they taste very unusual and quite good.
Q