Eva Boerg This isclaimed to be hardy and is  so similar to Lena, that I have yet to find a reason for keeping them both--- maybe I was sold one of the wrongly named  and they really are both the same!   They both have blue -purple petals in the shade and red -purple in the sun- and both have  white or pink sepals depending on the light they are flowered in.This  one pictured had a fair amount of sun.