Double herbaceous borders in the walled garden are full of grasses and late season herbaceous perennials that flower long into autumn. Grasses include Calamagrostis x acutiflora 'Karl Foerster', Calamagrostis brachytricha, Stipa calamagrostis, silvery Jarava ichu and miscanthus amongst flowers such as Hylotelephium 'Matrona', persicaria, lythrum and eupatorium at Cambo Gardens, Fife, Scotland in September