We plant fall blooming bulbs in the spring. No, only nature's system. A forgotten name Aster.
Spring is a good time to plant fall-blooming perennials as well.
It's not likely we'll see the color of most summer perennials, planted now, until next year. The first Hella Lacy greets September's sun. Chrysanthemums may be the first that come to mind. Garden variety garden centers must think so. The perennial aster which also blooms in the fall tra-la, doesn't get nearly that sort of hustler treatment.