About 10-14 days The majority of grass seed will germinate within 10 to 14 days, but occasionally it might take up to 30 days. When you put new grass seed in your yard, it might appear to take an eternity for it to sprout.
Will grass seed grow if I simply scatter it?
The brief answer is “yes.” Grass seed can sprout if you simply scatter it on the ground, but the germination rate will be significantly higher if you prepare the soil and distribute it properly. While the seed might sprout if you just scatter it on the ground, you should be aware that there are a few disadvantages to planting seeds in this manner. 
Can grass grow from seed in two weeks?
Grass Species – Grass Seed Sowing Various seed combinations germinate at varying speeds. In general, hardy seed combinations, which often include rye grass and red fescue, germinate within four days. Other seeds, especially bent and meadow grasses, may require up to two weeks to germinate. 
Does Grass Seed Need Water to Grow? – Grass seed will not germinate without watering since moisture in the soil is required to initiate and sustain the growing process. Water provides oxygen and hydrogen to the developing plant and transports soil nutrients.
