You can continue to deadhead around your garden as perennial growth has slowed but is still continuing uncharacteristically late into the season. Where you continue to see a few new growth buds, you can deadhead (removing the dead flowers only) and where stems of blooms have totally died, you can take the tops off in 6-12in lengths. Where perennials have grown large, stake them (if you haven't already) so they don't fall over. As leaves start to fall, pick up leaves lying on plants, but leave a small layer of leaves on the ground to protect tender plants and leave a haven for wildlife.
