Crabgrass is a common lawn weed throughout the United States. A summer annual weed, crabgrass germinates its seed in the spring once the temperature reaches 60 degrees F for between three to five days, then dies in the fall. Crabgrass releases its seeds in the fall, ensuring its return in the spring time. Its resilience to drought and terrible soil conditions. Although a crabgrass free lawn is uncommon, a healthy turf, along with chemical control, will control crabgrass growth.
Mow your lawn between 2.5 and 3 inches regularly depending on your grass type says Purdue University. Mowing lower weakens grass and promotes the growth of crabgrass. Remove one third of the grass blade at a time to prevent stressing the good grass .
Remove edging grass from the sides of walkways and driveways, as this is where crabgrass commonly grows recommend experts at the Cornell Cooperative Extension. Remove all turf from the area by turning a weed eater on its side and scalping the grass away.
Hand pull crabgrass from the lawn when it appears in isolated areas. Cornell Cooperative Extension recommends pulling after a rain since the soil is loose.
Apply a preemergent herbicide in the early spring, according to the chemical label. Applying as early as March 1, says Purdue University, may be enough to control crabgrass population throughout the growing season.
Apply fertilizer to the lawn at 2 to 4 lbs. of nitrogen per 1000 square feet in two applications says Purdue University. Apply using a fertilizer spreader in two directions so that the fertilizer overlaps. Fertilizer promotes a dense turf which crabgrass will not grow in.