But for trees in urban areas, all of those leaves can create big problems for local water systems. Leaves that fall in nature are often left on the ground and naturally decompose into the soil.

Every autumn we revel in the beauty of the fall ... leaves remain green or greenish the year round, and individual leaves may stay on for two to four or more years. Temperature, light, and water ...

Rake up leaves weekly and stash in the bag. When almost full, sprinkle with water, shake and tie. Store in a shady spot and the following autumn the leaves will have rotted down into a rich ...