No doubt about it, crabgrass is the bane of every lawn gardener’s existence. But that doesn’t mean herbicides are essential to a healthy lawn; in fact, many experts avoid them. The true secret to banishing weeds, they say, is to grow such healthy grass that it chokes out the invaders naturally. Mowing regularly helps too, because it tops off weeds like dandelions and crabgrass before they have a chance to scatter their seeds. When you do find yourself compelled to do battle against a path of weeds, Paul recommends using one of the new “natural” herbicides that derive their potency from corn gluten, salts from fatty acids or other nonchemical sources.