Cooler temperatures, hot apple cider, and hues of yellow, purple, and orange all come to mind when I think of fall. Fall is a beautiful season in the Portland metro area. It usually starts to cool down, but we aren’t in the constant rainy season yet, allowing us to still spend some time outdoors.
Our streets will soon be lined with beautiful colors from our deciduous trees. The beautiful colors we love will soon be on the ground leading us to pull out our gloves, rakes, and leaf blowers. Our gutters may need to be cleaned because of the falling leaves and to prepare for our rainy season.
A common question that comes to mind when we think about deciduous trees is “what causes them to lose their leaves?” well, as sunlight is less available and the temperatures begin to drop, abscisic acid is formed at what you might call the stem of the leaf at the point where it attaches to some sort of limb.
Abscisic acid (also known as Abscisin II & Dormin) helps the leaf to go dormant by closing larger cells that exchange gasses and allow for the release of water through the leaves during warmer months. The shutting down of the leaf then facilitates its being shed.
Owner and Certified Arborist Rich Gillum, of Rich’s Tree Service, Inc., has been serving the Portland Metro areas for over 24 years. We are a licensed, bonded, and insured tree care company that specializes in pruning, preservation, and removal. Customers can read our reviews on Angie’s List, The BBB, Facebook and ask for a list of commercial and residential references to learn more about our superior service.