Hylotelephium — 11 species

Hylotelephium — the tall stonecrops formerly grouped under Sedum — are fleshy-leaved perennials prized for their late-season flat-topped flower clusters, exemplified by 'Autumn Joy' and Orpine. They demand full sun to keep stems upright and compact; shade causes flopping. Water sparingly: these succulents store moisture in their leaves and rot quickly in heavy or waterlogged soil. Allow the top inch of soil to dry fully between waterings. Toxicity varies across the genus; research the specific cultivar before introducing it to a home with cats or dogs.