There are occasions when you should not mulch your lawn. For example, your lawn may have been allowed to grow much longer than usual on occasion, perhaps because work or family commitments have prevented you from getting the grass cut when it should have been. In addition, wet weather sometimes persists in the summer months, necessitating cutting the grass whilst it is wet. Under these circumstances, it is unwise to use the resulting clippings as a lawn mulch, they will be much better used as compost as wet clippings will be unevenly distributed and will form clumps which may...