I have had many of differnt colors. Last year I had the hybrid kind that had every color of the rainbow in one plant. It was beautiful!!! I decided to take cutting off them and grow them. When they came up, every last cutting bloomed purple. I also had some red and pink ones. I took cutting from it and planted them in my moms yard. Every last one of those came back purple! Now why do the different color cuttings always come back purple when the flower color you cut is a entirely different one??