Humidity is seldom a problem for plants growing outdoors, but it can cause problems for interior plantscapes. Because of the drying effects of central heating and air conditioning, interior plantings must adapt to an air environment that may contain half or less of the relative humidity outside. Interior humidities of 40 percent or less are common.
Preparation for the dry air must begin during the acclimatization process. Gradual drying of the plant’s atmosphere will usually allow the plant to survive after transplanting indoors. In some cases, attempts to increase the humidity around plantings by misting the foliage during the day have proved to be of little or no value. Misting may also cause damage to carpeting or furnishings. Proper acclimatization is the best solution at present.