Pawpaws (Asimina triloba) are small deciduous trees that can fit into almost any landscape. Native to North America, they grow wild in 25 eastern states and Ontario. Thriving in river-bottom lands where the soil is deep, moist and fertile, you can usually find them growing in clumps and thickets. The pawpaw trees available for sale in nurseries and online sources are usually grown from seeds, although you can occasionally find grafted trees. You probably won’t be successful planting a pawpaw tree that was dug from the wild. These saplings are usually root suckers that won’t have a good root mass of their own.