Winter may be cold and dry for outdoor plants, but our indoor plants suffer from hot and dry. With the thermostat set at 68 or 72 degrees, you are drying out the air as you warm it. Place plants on a tray covered with pebbles where you regularly add water. As the water evaporates, your plant breathe easier. Plants too big to be gathered together? Add pebbles and water into large saucers under each individual. Additional humidity in the house is also a benefit to you. Plants also need regular watering, but less than in other seasons. Unless you are using grow lights, your plants will respond to the reduced light by slowing down their growth which also eliminates the need for fertilizing.