Fir trees, like most conifers, have adventitious roots, thick barks, and rapid life cycles to help them survive in extreme conditions and withstand forest fires. Fir trees are equipped with special root structures, called adventitious roots, which grow directly from their trunks to help keep them anchored on steep mountain slopes and resist strong pressure from blowing winds.
Fir trees also have thick bark that is nearly twice as thick as the bark of many other trees. This bark protects the trees from the extreme heat generated by forest fires and helps hold water in times of water scarcity. Firs also have rapid life cycles and produce seedlings early in life to help the species survive.