Cool Season Grass Seed
The North half of the U.S. is generally adapted to cool season grass seed. These areas have cold winters with temperatures that fall below freezing and warm summers, without long extended hot periods. Usually there are regular intervals of rain throughout the summer months. To keep a cool season lawn green throughout a hot, dry period, requires supplemental lawn irrigation as cool season grasses need about 1 inch of water a week to stay green during the summer months. Cool-season grasses grown from grass seed will tolerate some extended periods of drought by going dormant. Extended drought for periods longer than 4 weeks combined with hot temperatures, will cause death of the turf grass and you will have to re-seed new grass seed.
There are 4 major types of cool-season grass seeds: bluegrass, fescue, rye grass, and bent grass. Cool season grasses are most actively growing in the spring and early fall when soil temperatures are between 55 and 65 degrees. This is typically the time period when you plant cool season grass seed as well.
Warm Season Grass Seed
The Southern half of the U.S. is generally adapted to warm season grass seed which are of tropical origin and thrive during the scorching summer heat. They are tough and form a dense lawn cover that thickens as they age when planted from grass seed. They are not green during the cold spells of winter. Their leaves turn brown in late fall and don't green up again until warm weather returns. In general, they are green a little over half the year depending on how mild winter time temperatures are. Many people overseed warm season grasses with cool season grass seed in early fall so they have a green lawn over the winter. Warm-season grasses are best suited for lower and middle South regions which includes from Virginia clear over to Southern California. The warm season grass seed we offer are: bahia, bermuda, buffalo, carpet, centipede, seashore paspalum, and buffalo grass seeds.
One critical problem with warm season grasses is they are not very shade tolerant. St. Augustine is the most shade tolerant warm season grass, but is not available from grass seed. For shady areas in the South, turf type fescue usually performs pretty well when planted from grass seed.