Rosette flowers bloom along the stalks of this cottage garden heirloom. Bloom starts in early summer with columbines, foxgloves, lady's mantle, and other perennials that thrive in dappled sun. Cut back the flowering stems once flowering is over, but leave foliage over the winter months, tidying up in spring if needed. They suffer in prolonged heat and humidity but are cherished flowers for northern gardens or wherever summer nights cool down. Perfect for woodland edges and gardens that get some afternoon shade. Leave a few stalks to drop seed or divide in spring or after flowering every three years.