Weeds are categorized by their life cycle, and identifying them as annual or perennial is a key step in effective control.

Take a walk around your yard, and look for young weeds. “Ideally, you want to find them before they take off,” says Waltz.

We asked our on-staff experts and turf scientists across the country to identify some of the most common lawn weeds, pests, and diseases nationwide, as well as the most common mistakes homeowners ...