Freezes can kill a ficus tree. To keep your tree alive through the winter, you must protect it from the cold. You have several options for doing so, and if you live in a region with occasional freezes for a night or two, your task becomes easier than for those in colder climates. Whether it is in a container or in the ground, you can protect your ficus from the freeze.
Water your ficus tree well before and during a freeze to maintain soil moisture.
Bring ficus trees grown in containers indoors during freezing temperatures and leave near a warm, sunny window until warmer weather returns.
Drape incandescent Christmas lights around the branches of outdoor ficus trees. Plug the lights into an outdoor extension cord to provide heat from the lights for the plant.
Wrap a blanket around the trunk of the ficus tree, securing it by wrapping wide rope around the tree and blanket.
Lay a plastic tarp over the entire tree to create a mini-greenhouse, and attach to the ground by inserting a stake through each of the four corners of the tarp.
Wait until temperatures reach above 40 degrees Fahrenheit before pruning off any dead or frozen limbs from your ficus.