I started digging the three holes for the bare roots that arrived yesterday. Planting instructions say 24" deep and 18" wide. I'm digging in adobe and I'm not the man I use to be. I'll try to make it to 20". It is pretty difficult to get much beyond that with a shovel and I don't remember going much more than 18" in the past. I've come across roots an inch in diameter, remnants of a palm tree and embedded rocks. I have no idea where the root came from. I'm glad I'm digging one day and planting another.