Pink Stripes performs very well for me in my Zone 5 garden. It is usually taller than registered and blooms for a long time. I have blooms on it from mid July to mid-late September. I was expecting it to struggle in my garden, but it has done very well for me. My clump got so big, that I took it to my club sale and it sold out instantly. It is pod and pollen fertile. I hope to have some seedlings bloom this year.
David
