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 ...

It's officially fall in the Northern Hemisphere, which means bright, beautiful foliage isn't far behind. Parts of the U.S. will soon start to see — if they haven't already — leaves and shrubs trade ...

There are a lot of leaves outside my window, and I'm guessing your view might be similar. This carpet of dead foliage is often viewed as a nuisance, but it can be an important component in the garden.