I've grown this cultivar for several years and have also had fertility problems. In fact, I no longer try to set pods or use the pollen since the success rate was so low. However, it is a vigorous plant and increases nicely even in the heat and humidity of the long Georgia summers.
One thing I have noticed is that it has never performed like a dormant/deciduous plant in my garden. During winters when we have nights in the low 20's (like we did last week) or colder, the leaves turn to mush just like any other daylily, but during mild winters, it never drops all of its leaves.
