at what temp does grass seed germinate
Submit. Rye grass seed sprouts in soil temperatures of 50 to 65 degrees Fahrenheit and air temperatures 10 degrees higher. Cool-season grasses, both annual and perennial rye grasses perform best in spring and fall and deteriorate in the summer heat.Keywords: rye grass temperatures, ryegrass best temperature, rye grass seed.ye grass seed sprouts in soil temperatures of 50 to 65 degrees Fahrenheit and air temperatures 10 degrees higher.