Location / Light
Place your airplants/tillandsias in medium–bright indirect light. Keep in mind they may burn if they get too much direct sun.
Water
Since airplants absorb nutrients through their leaves it is important to mist or drop water on your plants once or twice a week. Alternatively, plants can be submerged in water for 15 minutes about once a week. Soaking is the preferred watering method if the surrounding air is very dry. A longer period of submersion (up to 1 hour) can also benefit airplants before and after a period of non-maintenance, such as a two or three week holiday.
Troubleshooting
Brown/crispy ends? Water more often. Brown/mushy base of airplant? You’re watering too much. Ensure you are not pouring water into the center of the plant, shake airplant out after watering. Humidity? Bathrooms with natural light work great!
TIP! Water your terrarium with an eye dropper to control the amount and location of the water.