As the days become shorter and cooler, plant growth slows and gardens prepare for a much-deserved rest. With fewer daylight hours, water remains in the soil for a longer period of time, and less irrigation becomes necessary. Scale back the amount of time your irrigation system runs in the fall to avoid soggy conditions and mud. Some plants are particularly sensitive to overly wet soil, and root health may begin to decline if left standing in water for too long. Reducing your irrigation schedule will reduce your water bill and keep your garden looking good into the winter.