I've been wanting a Mimosa tree for years. You cannot find them at the landscape places -- my guess is that they are 'wild' in Oklahoma. A volunteer seedling came up in a crowded flower bed, so I decided to give it a premier spot and transplant. I've set up the patio umbrella to give it some shade from the still hot summer sun.
Here is the seedling I just planted:
I'll post updates if it is a successful transplant!