I grew PawPaw for work and at home from seed, it takes a long tome to get a fruiting tree, about 10 years. This was in the Willamette Valley of Western OR. and my place in the foothills of the cascades, Sunset zone 6. They did very well and was the only fruit we bothered selling at the farmer's markets due to it's popularity and high value. The trees have lovely nearly black blooms and are monecious, both male and female parts on the same bloom. They do need another tree that is NOT a clone for fertilization.
"Pawpaw is self-incompatible, which means that pollen produced on a plant cannot pollinate flowers on the same plant. Instead, to produce fruit, a pawpaw flower must receive pollen from flowers on another tree."
This is very common for fruiting plants.
They may sucker in some areas, I had wonderful sandy loam and they did not, I found this to be the case with other trees. Although I did suspect that some of the other trees that suckered in different soil had trunk damage form rodents. They were also lovely in the fall turning a nice bright yellow.
Fruits are eaten by slicing them in half lengthwise and scooping out the custard like interior with a spoon. You won't find the fruits easily since they do have a very short shelf life so Farmers Markets are about the only place to find them and only in Oct. out here in the west.
