All plants need air, but houseplants don't get much fresh air when it is cold outdoors. Indoor plants suffer if they are too close to radiators, vents, fans or open windows because they dislike drafts: Move them back from windowpanes if it is frigid outside.
Ways To Produce Humidity In Our Dry, Winter Homes
Many of our foliage plants are native to tropical rain forests and love humidity. Here are some ways to create humidity for our houseplants (and ourselves!):
Some DON'T Like It Hot
Most home temperatures are between 68 to 72 degrees and foliage plants enjoy that range. However flowering plants such as azaleas and cyclamen like cooler temperatures. Flowers on plants last longer if they are kept cooler at least part of the time, so lower the thermostat at night. Plants like gardenias and Christmas cactus won't set buds unless they have cooler temperatures, but once buds are set they will tolerate normal indoor conditions. Withhold water from the cactus to force it into bloom.