There is a new verbena coming this spring that is like “Cashmere for Swallowtails,” plus its beauty and garden charm will sweep you off your feet. It’s called Superbena Pink Cashmere and the excitement it is creating has most of us counting the days until spring. I wrote about Superbena Pink Cashmere around seven months ago as The Garden Guy, industry and universities were all trialing it simultaneously. That was really an accomplishment for Proven Winners and a lot of fun. As I was watching it in my backyard and at a friend’s window box in Phenix City, Alabama, I was also able to also see it …