There are around 10,000 species of grass plants recorded, but of those, only about 50 are suitable for planting as lawns. It can be confusing to figure out what grass seed would be best for your lawn, but realize there are basically two kinds of grass plants, cool weather and warm weather.
The cool-weather grass is for areas with four seasons. The grass can live through the freezing, thawing, drought and rain of the different seasons. Kentucky bluegrass, perennial ryegrass, red fescue, and turf-type tall fescue, titan and thermal are examples of cool-weather grasses.
The warm-weather grasses tend to brown during the winter months and seem to grow better from sod or grass plugs than from seed. Centipede grass, Bahia, St. Augustine grass, buffalo grass, Bermuda grass and Zoysia are examples of common warm-weather grasses.
Sowing grass seed of both types should be done in the spring or fall before the heat and before freezing in the North.