The late summer flowering perennials are still looking good, particularly Schizostylis / Kaffir Lily, Anemone japonica and Aster novi-belgi.
Verbena bonariensis, Penstemon Garnet and Hardy Fuchsia are going strong since early summer with lots more buds.
Ornamental Grasses, Miscanthus varieties have come to their own now.
Evergreen shrubs Choisyia Sundance and Euonymous are great for pots especially with winter and spring flowering bulbs around them.