Slime mold gets its name because it often looks gooey and slimy. Slime mold comes in many different shapes and colors, including yellow. Slime mold most often is found outside because it feeds on dying plant matter. Slime mold will usually go away on its own. If you are in a hurry, get rid of slime mold by cutting off its source of "food'' and removing it from the area.
Prepare the area where the yellow slime mold is to be removed. Mold thrives in damp and shaded areas. Expose the area to as much sunlight as you can. Remove (or cut back) tree limbs or shrubs. Make sure the area has proper drainage and that the downspout from a gutter or a roof is not draining water into the area.
Remove the mold's source of food. Rake up mold-infested mulch as well as leaves and other organic material.
Collect as much of the mold as possible with a shovel. Place yellow slime mold in heavy-duty garbage bags.
Break up remaining yellow slime mold with a hose, rake or broom. Be careful not to spread broken-up mold to other areas. Place mold in heavy-duty garbage bags immediately.