Yes, you can make mulch from leaves found in your garden. You can make leaf mold mulch by stuffing as many leaves as possible into a garbage bag (or several bags if you’ve got a lot of leaves). Tie the top closed and poke lots of holes across the bag’s sides. Place the bag in an out-of-the-way place in the garden to allow the leaves to rot away; leave like this for up to a year. Once rotted, the leaf mold mulch can be removed from the bags and applied to the garden as mulch in early spring or during autumn/fall.