Fall is an ideal time for fertilizing your lawn. Remove fallen leaves by raking and composting them or mulch them with a mulching lawn mower.
Whether you have a pond made of a flexible vinyl or a pre-formed plastic liner, there are steps you should take to winterize a water feature. Cut back hardy and tender aquatic plants. Bring tender plants indoors and store in a shallow container filled with a few inches of water near a sunny window. Because some plants like tropical water lilies can be somewhat difficult to overwinter indoors, it may be best to treat some tender plants as annuals. Remove tender floaters, like water lettuce or water hyacinth, that won't survive the winter indoors or outdoors. If your pond is less than about two feet deep, gather fish into plastic bags filled with pond water and bring to an indoor aquarium. Sink plastic bags containing the fish into the aquarium and allow time for the water to come to a temperature equilibrium before dumping the fish into the aquarium. If fish are kept outside during the winter, stop feeding them as their metabolism slows down. Remove leaf litter or other debris from the water.
Turn off water to irrigation systems and set automatic timers to the "off" mode. You may not want to turn the controller box off completely so you don't lose the watering schedule and have to reprogram it next season. It may be necessary to drain or blow the water out of the pipes. Consult your local irrigation specialist on recommendations. If any pipes, valves or the backflow preventer are above ground and exposed to the elements, wrap them with protective insulation, like insulator tape, to keep them from freezing. But don't insulate or block air vents or the pump motor.