5.Should I bag the grass clippings, mulch them, or allow them to remain on the lawn?
a). When should I let the clippings lie? If mulching is possible, and if the use or the appearance of the area will not be affected, mulching is recommended.
If mulching is not available, it is strongly recommended that the one-third rule be strictly adhered to. Keeping the clippings short allows them to more quickly fall down off the surface of the turf to the soil surface and begin decomposing. The shorter the clippings, the more rapidly they fall to the soil surface and the less disruption there will be to the appearance of the turf area.
b). When should I mulch? If possible, clippings should be mulched every time the turf is mowed. Exceptions to this would be when the grass is unusually high and/or wet. In such cases it probably will be necessary not to mulch but rather bag or rake the area after mowing.
c). When should I bag? Bagging should be done only when mulching cannot be done or the presence of even a small amount of clippings left on the lawn is objectionable.