Continue to deadhead flowering plants unless the seedheads are needed for decorative purposes, or for the seeds themselves. Cut back hardy plants to the base; however, in cold areas, this foliage should be left to provide the plant with some protection against frost and wind. Divide old or congested clumps of perennials so that the roots can re-establish before the winter.

Plant hardy, bare-root and container-grown perennials in prepared ground, and transplant any established plants that need to be moved. Protect tender perennials from frost; insulate their crown and roots with straw and hessian, use a cloche or bring under cover over winter.