Sheet Mulching (Lasagna Gardening) – Does It Harm Soil?

Sheet mulching, also called lasagna method or lasagna gardening, is a popular technique for creating a new garden. Some people even use it as an annual mulching system to keep weeds down.

Lots of people claim success with the technique because it does kill grass and weed plants. Others claim that sheet mulching reduces the oxygen levels in the soil, thereby harming the biology in the soil. Which side of the argument is correct? Should you be using sheet mulching in the garden?

Sheet Mulching (lasagna gardening) - does it harm the soil biota
Sheet Mulching (lasagna gardening) , Photo credit The Real Dirt Blog

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