Between 50deg and 65deg F
Cool season grass germinates best when the soil temperatures are between 50 and 65 degrees F. These temperatures usually occur when the daytime air temperatures are between 60 and 75 degrees. High temperatures of summer can cause these plants to go dormant and thus planting during summer is asking for problems. Start planting your cool season grass seeds when the temperatures reach 75 and are dropping as fall / winter approaches. Or have reached 60 and are rising in the spring. The BEST time to plant Bermuda Grass Seed is in late spring / early summer after soil temperatures are 65-70+ degrees or higher and all danger of freeze or frost is past. Plugs, Sprigs and Sod will not produce roots unless the soil temperature exceeds 55&#176 F for several weeks. Keep this in mind when deciding on when to sprig, plug or sod a warm season grass such as Bermuda. PLANTING BERMUDA GRASS When to Plant: Bermuda grass is a warm season turf grass. Plant Bermuda grass seeds in spring and summer when soil temperatures are consistently above 65° F (18° C). Plant 2 to 3 pounds of Bermuda grass seed (coated seed) per 1000. square feet (1 kg/100 square meters) for new turf applications. More seed may be needed when stands are. established early or late in the season to ensure full coverage. 1 The difference between cool weather and warm weather grass types. 2  Which climate zone you live in. 3  When you should plant your grass for the best results. 4  How to prepare your home for vacations, extended leaves, or before selling to keep your pipes from freezing. However, there are some general guidelines to follow: 1  Seed cool weather grass seeds in late summer to early fall. 2  Seed warm weather grass seeds in early spring and into the summer. 3  Plant in regards to the grass seed and not the area Grass seed not in good contact with the soil cannot warm up correctly for successful germination. Seeds rely on warmth and soil moisture to swell and sprout. If your seeds remain at their ideal temperature range and are planted no more than 1/4 inch deep, you should see germination after three weeks. It is critical to keep the top 1/2 inch of soil moist with a misty spray so the seeds continue to absorb moisture as the seedling grows larger. Germination Failure. Grass seeds may fail if the temperatures aren't right for the particular type of grass. For example, warm-season grasses planted during a spring cold snap will stay dormant. As they lay in the soil, surrounding weed seeds take over the space and make it harder for the grass to become established. When To Plant Fescue Grass. Fall is the best time to plant fescue and other cool season grass. Planting in the Fall presents the least risk of planting failure for cool season grass. Plant your cool season grass seed when the fall temperatures reach 75&deg and are dropping as winter approaches. Alternately the second choice is to plant in spring when spring temperatures have reached 60 ° and are rising in the spring. Cool season grass such as Fescue, germinate best when the soil temperatures are between 50&deg and 65&deg degrees F. These soil temperatures usually occur when the daytime air temperatures are between 60&deg and 75&deg degrees. Seeding Rate for New Turf Applications: Plant 2 to 3 pounds of Bermuda grass seed (coated seed) per 1000 square feet (1 kg/100 square meters) for new turf applications. More seed may be needed when stands are established early or late in the season to ensure full coverage. Plant 2 to 3 pounds of Bermuda grass seed (coated seed) per 1000. square feet (1 kg/100 square meters) for new turf applications. More seed may be needed when stands are. Usually planted in the early fall, cool-season grass seeds prefer daytime temperatures ranging from 60 to 75 F. With this temperature range, the soil itself is usually between 50 and 65 F -- the right environment for germination. Germination Failure. Grass seeds may fail if the temperatures aren't right for the particular type of grass. For example, warm-season grasses planted during a spring cold snap will stay dormant. As they lay in the soil, surrounding weed seeds take over the space and make it harder for the grass to become established. Temperature. Grass seed germinates when the soil temperature is 65 degrees and above. It's important to understand that it is the soil temperature, and not the surrounding air temperature, that is the trigger for seed germination. Grass seed needs a minimum temperature of 65 degrees and will germinate faster at higher soil temperatures as long as the increased heat doesn't dry out the seeds and soil.
http://grassing.com/info/best-time-to-plant-grass-seed.html http://bermudagrass.com/info/whentoplant.html http://www.wakeforestnc.gov/data/sites/1/media/departments/communications/planting%20bermuda%20grass.pdf http://www.greatdayimprovements.com/when-to-plant-grass-seed-in-your-state.aspx http://homeguides.sfgate.com/warm-must-plant-lawn-grass-seed-67816.html http://fescue.com/info/whentoplant.html http://www.wakeforestnc.gov/data/sites/1/media/departments/communications/planting%20bermuda%20grass.pdf http://homeguides.sfgate.com/warm-must-plant-lawn-grass-seed-67816.html http://www.ehow.com/way_5762636_temperature-planting-grass-seed.html
what temperature should it be to plant grass seeds