Thanks for confirming that my "big pot in the ground" idea might work (as long as there are holes at the bottom and not too small). I''d really prefer not to stunt the tree's growth, but don't want it to cause major issues either. The placement of the tree will be far away from the house & important pipes... but near a fence and irrigation pipes. So I can't decide whether to do the pot thing or not
Below is the photo that brought on the initial concern. I'd be ok if the visible roots in this photo is as far as the tree expanded, but not if the roots were as wide as the tree leaves are. Would you guess that the roots in this picture extend as far as the leaves are extending? Or do you think the roots don't go much beyond what you can see? Just trying to get a handle on how big of a root system this tree likely develops at full maturity. Appreciate any guesses as to the size of the root ball in that photo.