When winterizing your fig tree, the first thing to remember is that you don't want the root system to freeze. Wrapping the tree in burlap is okay, but wrapping in white plastic is best (not dark or clear plastic) as it offers more protection from the cold. Before you wrap your tree,  make sure that the warm weather is gone. Wrapping your tree too early or in dark or clear plastic can cause heat and humidity to collect and lead to disease. Be sure to remove all leaf litter and old fruit: This will reduce disease activity.