Planting in the walled garden mixes grasses and late season herbaceous perennials that flower long into autumn. Grasses include bright Carex muskingumensis amongst flowers such as sanguisorbas, monardas, Persicaria amplexicaulis 'Firetail', P. amplexicaulis 'Alba' and Lysimachia ephemerum at Cambo Gardens, Fife, Scotland in September