Answer: The turfgrass is probably a warm-season grass which goes dormant (turns brown) in cold weather. It will green up again in the spring as the weather warms, or you can over-seed it with a cool-season grass and it will green up sooner. According to the University of Maryland, the following grass seed types do well in your area:
Full Sun High Maintenance Turf - For use in full sun areas that will receive irrigation and intensive management. Perennial ryegrass may be added where rapid establishment is necessary for erosion control.
Kentucky bluegrass (85-100%) and perennial ryegrass (0-15%) -- A minimum of 3 bluegrass cultivars should be selected, with each ranging from a minimum of 10% to a maximum of 35% of the mixture by weight. No more than 15% of a perennial ryegrass cultivar should be used as it will predominate if seeded at a higher percentage.
Full Sun to Moderate Shade Turf -- For seeding locations that have both full sun and shady sites. Two different types of seed mixtures may be selected for these sites. Tall fescue turf will tolerate a wider range of management inputs.
Kentucky bluegrass - fine fescue turf will generally require higher maintenance for the survival of the Kentucky bluegrass in the sun, but reduced maintenance inputs are recommended for the maximum survival of the creeping red fescue in the shade.
Turf-type tall fescue (100%) -- A single cultivar or a blend of turf-type tall fescue cultivars may be used.
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