What maintenance does a cedar deck require?
Cedar is naturally rot-resistant, but not 100% rot proof. Keep it clean &amp; dry.

Leaves are especially good at promoting rot. They are design to turn in to new soil to feed the tree they fall from, so they rot fast. If they clump up on your deck, they will hold moisture &amp; invite fungus to break them down. That will hurt your deck, too.

In general, look for anything that will hold moisture against your deck. Yard debris, a door mat, etc.