I have a bunch of them naturally and have never grown any from seed. What I have seen of those on my place....they are an understory tree.....they don't like full sun. From what I have seen they don't like 75% sun, but it's better than full sun. They also like a particular soil as well. I have then in the flood plain and creek bottoms. Coarse soil, deep and fertile, with adequate moisture but not standing water. They don;t seem to like a high clay content soil either. Typically areas of a higher water table. Occasional flooding is OK but never for prolonged periods of time. They are weak and brittle so out in the open you can expect a fair amount of wind damage. I have some that are in full sun and 20 feet tall....those look sick and hardly ever produce. I have some in broken mature canopy with 50% sun and half as tall and they thrive! The native ones are not orchard trees....or upland type trees. They seem to like the similar growing conditions of my black walnut, hackberry and boxelder trees.