Salvia Uliginosa Ballon Azul
This is a very good form collected by German nurseryman Ewald Hugin of Freiburg.
It grows to about half the height of the type species, it is much more hardy and is generally a better doer.
We have never lost a plant of this form in 10 years whereas we often lose its taller cousin.
Ht: 1 metre.