No one has responded to this old thread, so I will as I own this plant.
I obtained Lavender Vista as part of the Evergreen Collection from Oakes Daylilies in the fall of 2019. It was a fairly large, healthy clump of 5-6 fans, like most of their plants. The reviews on the Oakes site suggested it was slow to increase, and that has certainly been the case here. Lavender Vista has dwindled since I planted it although evergreens normally do very well here in zone 8b.
It did bloom in the spring of 2020 although the blooms were not profuse. The next year it did not bloom, and the plant has not thrived. In fact the fans have gotten very small. I am thinking of potting it up and moving it to a sunnier location to see if that will help.
Here's my Lavender Vista in bloom (spring 2020):
Here it is now (August 2021):
