Answer: There are a few exceptions, but most ferns will adapt to growing indoors. Give them bright light but not direct sunlight. Ferns will tolerate a temperature of about 50 degrees but their growth will slow when temperatures are low. Use tap water or room temperature water - not warm water - when watering them. Since growth will be slow during the winter months, don't fertilize at all. In the springtime you can take them back outdoors and lightly feed them with a half-strength dilution of liquid fertilizer (such as Miracle Gro or Peter's).
Best wishes with your ferns!
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