Fig rust disease can also be a problem. Since the fruit forms on terminals of wood from the year before, prune your fig only to maintain the preferred size. If you choose to prune, do so only after the fruit ripens, early in the summer; a heavy winter pruning has the potential to eliminate the next year’s crop. Figs tolerate temperatures down to 18 degrees. If your tree suffers from freeze damage, it will regrow in bush form. Freeze-damaged wood should be pruned away once when regrowth begins.