A lot of growers have upright Mimosa trees available- we thought we'd play around with a few and train them to grow horizontally. These will be perfect for an accent reaching over a hardscape or (if you don't mind cleaning up the flowers) cascading over a pool or water feature.
Albizzia julibrissin- being horizontally trained
These Mimosa are all Albizia j. 'E.H. Wilson', known for being the most cold hardy variety available- down to Zone 6 (-10 degrees).
Albizia julibrissin- training