forsyth

Just to name a few:

Poppies, sweet peas, sweet william, scrambled eggs (or sometimes called butter and eggs), primrose, magic lily, peonies, painted fern, anemones, bloodroot, bouncing bet, indigo phlox, rose of sharon, oxalis, violets do better if planted in the fall. Takes two years or a cold winter for them to properly mature. Others, plant in spring or early summer and expect blooms next spring or summer.

from seeds

Depends on the perennial you are planting and whether from seed or cutting.

Now - - and in the fall.

when is the best time to plant a perinial flower garden?