Yes! Ficus trees do not respond well to low temperatures, and they cannot withstand drafty conditions. For best results, they need to be kept in temperatures above 60 degrees Fahrenheit (or 16 degrees Celsius). While this is the bare minimum, they actually prefer a little more than that! Ideal temperatures are above 70 degrees Fahrenheit (21 degrees Celsius). If you notice that yours appear to be in distress, consider if they might be near a cool, drafty spot. Even areas with lots of sunshine can get too much air from windows or doors. To avoid this issue, place your planter where it's far from such areas.