I'm new to posting here so this is actually an experiment in uploading photos. I really enjoy seeing everyone's creations! For me, my love for perennials includes the varied green foliage in the garden bed that predominates for much of the season. So much so, that the only annuals I buy each year are for my containers, hanging baskets and hayracks - none of them are flowers. The bonus is that I can overwinter many of the plants indoors, when I so choose. In these pictures, you can see the plants in May soon after planting and then again in 2 months later.
Here is a link that might be useful: Maturing containers