Common lawn weeds in Maryland come in three basic varieties: broadleaf, grassy and grasslike weeds. Broadleaf weeds are the easiest to identify and consist of multiple broad, flat leaves that spread outward from a central stem. Grassy weeds and grasslike weeds are much harder to identify because they resemble grass and, in some instances, actually are considered a true grass species.
Crabgrass is a broadleaf, annual, warm-season weed commonly found throughout Maryland. Crabgrass is a fast-spreading, opportunistic weed that grows best in warm summer temperatures and direct sunlight. Crabgrass survives the winter months as seed, sprouts mid-May and perishes during the first fall freeze.
Foxtail grass is a common lawn weed with coarse, broad leaves resembling Crabgrass. Foxtail grass forms flat, dense tufts and produces a large visible seed pod. Foxtail grass seeds germinate late spring and survive until the first freeze.
Goosegrass is a grasslike lawn weed with smooth, folded leaves commonly found interspersed with turfgrass. It is highly pernicious and opportunistic by exploiting bare patches in lawn grass. As a hardy weed species, Goosegrass is specially adapted to growing in dry, compacted soil environments.
Dandelions are one of the most widely occurring lawn weeds throughout Maryland and the rest of the United States. Dandelions are a perennial, herbaceous plant with distinctive arrow-shaped leaves and bright yellow flowers that blossom during the summer months. Dandelion flowers mature into globular seed pods containing thousands of individual seeds that are dispersed by a light breeze into the surrounding area.