Landscape · L-QRD8S

Planting Bed and Lawn Subgrade Prep

Elements

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The subgrade is excavated to accommodate compost and soil depths at a maximum one-to-one slope and ripped to a minimum eight-inch depth. Two and a half inches of compost are tilled or ripped into the ripped subgrade to a depth of six inches. Planting or bioretention soil is installed in a minimum of two lifts, with the first lift tilled into the prepared subgrade, and varying depths per the soils plan. The top mulch is installed at a depth of three inches, or two inches in ground cover areas, with the finish surface positioned one-half inch below adjacent paving.

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