The classic tropical houseplant, Boston ferns love humidity and do best in indirect light. They can grow up to 3′ high and wide and can be moved outdoors during summer so long as they are kept in a shady spot. Boston ferns make great underplanting foliage for larger plants like banana trees.
Never allow Nephrolepis exaltata Bostoniensis soil to dry. When room temperatures are above 55°F water the plant plentifully as often as necessary to keep potting mix thoroughly moist. If the temperature drops below 55°F for more than a day or two, allow the top third of the potting mixture to dry out completely between waterings.
A natural air humidifier, Boston fern removes formaldahyde and is said to be among the best of air purifying houseplants.