Sheet mulching increases the population of beneficial soil microbes and worms, improves the ability of soil to retain nutrients and water, and reduce weeds. But best of leaf mulch is that it creates fantastic new spaces landscaped with only a small amount of effort on your part.
Instructions to leaf mulch: determine where you want to place your new garden bed. Avoid grass creeping into her new bed installing 6-inch wide galvanized metal edge around the entire perimeter. Mowing weeds or grass within the perimeter of the bed. Start microbial activity in the soil by spreading 1/4-1/2-inch of compost on the ground. Then water bed soil drench to a minimum of 5-inches.
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Now place single layer of very tough on the whole bed board. Cut the cardboard to fit your curves if bed. Add layer of 2 inches of compost or composted manure over the top of the carton. Place 4-inch layer of mixed vegetable matter such as grass clippings, leaves or straw combined with ground, on top of the compost.
Start the bed with 2-inch layer of wood chips. Finally, to leaf mulch, wait 6-8 months for the compost to break down and then plant directly into the soil rich in your new garden bed.