A leaf may appear to be one of the simplest structures in nature, thin, delicate and easily overlooked. At first glance, it ...

We've all heard the classic saying "leaves of three, let it be," which means don't touch the poison ivy. But just how accurate is that timeless phrase? While this specific mnemonic device exists to ...

Gray leaf spot starts before you see it. Are you scouting early enough to catch it before it moves up the canopy?

Warning: This graphic requires JavaScript. Please enable JavaScript for the best experience. Not all trees drop their leaves in the fall. Even in the height of winter ...