Winter weeds typically grow in warm-season grasses during the fall and winter months, when cooler temperatures and dormant grass favor their development. This results in a poor appearance throughout these months, in addition to quick weed growth the next spring, as grass struggles to grow in these weed-infested areas. Preventive measures work best to control winter weeds, but several methods exist to effectively control and kill lawn weeds in the winter as well.
Things You'll Need
Pull weeds appearing in your lawn over the winter months. This works best if only a few weeds appear in your lawn or your lawn is relatively small. Remove weeds with a shovel and dispose of in the trash or compost pile. This ensures complete root removal and prevents further weed growth from the same plant.
Apply post-emergent herbicides to control winter weeds. These herbicides harm lawns if used before grass goes completely dormant. Always water the lawn with at least 1/2 inch water following herbicide application for best results. Spot treatment proves effective for weed control in limited areas and is more environmentally-friendly.
Purchase a non-selective herbicide to use on winter weeds if they compose the majority of your lawn and you choose to reseed or lay new sod. Apply the non-selective herbicide in late winter or early spring, around February, suggests University of Arkansas Cooperative. Seed the area in two to three months with a grass species appropriate for your local climate and individual growing conditions.
Use pre-emergent herbicides in the fall to prevent winter weed problems in the future.