Thanks for your thoughts, TexasDeb and MartiDIY, on our dilemma. You sound like me for sure. Hate to kill anything. So what here's what happened. Today, we browsed our local nursery, Blanco Gardens, where we bought the tree senna. We spotted several Texas persimmons (Diospyros texana), which has been on my native wish list. We bought one!
Back at home, James dug up the senna, put it in a garbage bag, and gave it to a friend, who said she'd try to keep it alive. Then we planted the persimmon! Yay!
Between you and me, I really didn't like the tree senna anyway. It'd gotten way top heavy and leaned over. Just didn't look like it fit in our Wildscape. Now it'll be happier, and so will we.
Happy birthday to me! The Texas persimmon is my birthday plant for this year!