Winter can also be a dusty time for plants, and an occasional rinse with water helps leaves function better. Uneven central heating is another problem. Rooms far from the thermostat can be considerably cooler, as can areas near drafty windows and doors. Relocating plants within the home may solve these problems. Another temperature factor in very cold weather is cold tap water.
Cold water can shock or even kill root hairs.
Allowing water to reach room temperature before watering plants eliminates this concern. Photograph courtesy of Judy Sedbrook.