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Mulching with grass clippings is excellent for vegetables, flowers, and even fruit trees, but a lot of people do make mistakes when it comes to mulching with grass clippings, especially if they use it around their trees. Grass clippings around trees are an ideal way of providing valuable nutrients to the tress and also keep the nearby soil moist.
Apr 21, When using fresh clippings as mulch, lay a layer of only ¼ inch (6 mm.) thick. This will allow the grass to start to break down before it begins to smell or rot. Thicker layers have a tendency to remain too wet and can invite mold and create smelly decay issues.