Apache Rose is a new mid-height switchgrass with soft rose flowers and green foliage, below right. On the left is Blue Fountain switchgrass which is a taller form, with showy white flowers amid the very blue, fairly wide foliage. Both of these look good as 1 year old plants (planted in fall 2015). One of the Blue Fountain has been slow to grow (front plant). There are 4 of each of these plants in the Grass Collection at the Minnesota Landscape Arboretum.
grasstalk 
What is the hardiness of these 2 grasses?
So far, they both appear to be hardy in zone 4, Chaska, MN. Walther’s Gardens in Michigan is where I obtained the plants, not sure where they originated.