Many evergreen trees (pine, pinyon, and spruce) are currently exhibiting decreased vigor, twig dieback, and needle browning or needle drop. The primary cause of these conditions is prolonged drought. Dry air, low precipitation, low soil moisture and fluctuating temperatures are common conditions in western Colorado and trees can usually bounce back after one or two low-water years; however, stresses from prolonged drought harms trees by damaging root systems, reducing plant vigor and leaving trees more…