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Natural fertilizers supply the important plant nutrients nitrogen, phosphorus and potassium (N-P-K), which help lawns and plants create rich color and deep roots. In addition, N-P-K promote vigorous growth, which improves disease and stress resistance. Natural managed lawns cycle nutrients efficiently, which helps prevent a buildup of thatch an accumulation at the soil surface of dead, but undecomposed, stems and leaves. Importantly, grass clippings DO NOT contribute to thatch, in fact, cycling grass clippings can annually provide a lawn with as much as two pounds of additional nitrogen per thousand square feet; a nice boost of free nutrients.

The most important goal of any soil fertility program is the stimulation of the natural cycles that release nutrients for plant uptake. Ninety percent of the needed nitrogen for plant growth is converted from atmospheric nitrogen (78% nitrogen) by bacteria into nitrates through the natural cycle of nitrification. Natural fertilizers and water applied in the right combination along with the return of grass clippings provide the nutrients needed to support proliferation of these bacteria.