After application, wait until all weeds have completely died before cultivating your soil. Cultivate the existing soil with a shovel, spade or tiller to a depth of 8 to 12 inches. Improve the soil. Almost all garden soils need to be improved. Organic soil additives are materials added to soil to make it more workable and hold nutrients and moisture at stable levels.
Organic matter loosens tight clay and helps sand hold more water and nutrients.
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