Blooming Perennials for Heavy Clay Soil

Sue's new house has very high clay content. Many perennials tolerate clay, especially with added organic matter. Good choices: purple coneflower, Shasta daisy, hollyhock, hardy hibiscus, spiderwort (can be invasive), daylilies, iris, coreopsis, peonies, hosta, blue flax, baptisia, oriental lilies, tiger lilies, black‑eyed Susan, poppies, achillea. Amend annually with composted manure, leaves, pine needles, grass clippings.