Overwintering tropicals indoors and air humidity

Q: My rainforest plant collection thrived outdoors in our humid summer (I live in Maryland) but of course I had to bring them indoors for winter and now with snow outside they are suffering. Some leaves dried and fell of. Please advise how not to lose my babies over winter!

A: When overwintering tropical plants indoors, think about 3 factors: light, temperature, and humidity.
Light. Providing bright light is obvious, and all indoor gardeners are doing their best to have as much well-lit spots for their plants as possible.
TemperatureTropical plants, especially those from rainforest, do not enjoy significant fluctuations in temperature, so avoid following places: - neat hear register (or air conditioning vent) - in drafts - on a windowsill behind curtains at night
Humidity. Most tropical plants need more humidity than is available in the average, centrally heated home, but some rooms, such as bathrooms and kitchens, are more humid than others. To created humidity, fill a tray that is the same width as a plant, with pebbles or gravel. Pour in water, keeping the level at just below the top of the pebbles, then place your plant on top. The water will produce humidity as it evaporates. Alternatively, mist the leaves using a hand mister in the morning, so leaves dry before night. If you have hard water, use distilled or rain water. Grouping plants together will also increase humidity.