Tillandsias grow differently than most other house plants, so they can be confusing to the beginner. They are really very hardy, and require much less attention than other house plants. The following simplifies the instruction but you can scroll down for much more specific information.
Protect them from frosts
Most prefer cooler night temperatures – 10-15 degrees less that daytime is ideal
Give them bright, filtered light.
Provided If the atmosphere is not too dry (as in an air-conditioned home) they can survive with water misting and the occasional bath.
If you are growing them indoors and the air is dry, you will need (at minimum) to submerge the plant in water for 2-3 hours about every two weeks. Otherwise, in a shade-house or unheated home, you can use a soaking mist once or twice a week in summer, once a month in cooler weather.
Fertilize by adding a pinch of Orchid fertilizer to your mister.
From another source
Even though they are easy to care for, there are a few rules to follow when growing air plants:
Constant air circulation — as the name indicates — is paramount to keeping your plant happy.
Air plants need some moisture; from late spring to mid-autumn, mist daily. In winter, mist only once or twice a week.
Fertilize monthly in spring and summer using a low-nitrogen liquid fertilizer mixed at only one-quarter strength. In general, fertilize weakly.
Although they love warm weather, most air plants need protection from full sun. If it’s a type that grows naturally wild on trees, keep it in moist, partial shade. If it is a ground type, such as T. cyanea or T. lindenii, grow it indoors in bright, filtered light and outdoors in partial or dappled shade.
Don’t let an air plant sit somewhere that’s colder than 45 degrees; it will die at those temperatures. If you live in Zone 9 or warmer, you can grow an air plant outdoors all year if you keep it dry during the winter.