Why is my gr not growing?

You need to cover the gr seed with a light cover of straw to keep it evenly moist until it sprouts. (The straw just disappears about the time the gr first needs to be mowed.) If you didn't, my guess is that your seed has dried after it began to sprout, or that birds and mice or voles have eaten it all, in which case you'll need to reseed. Gr sprouts best in cool spring and fall, so the temperature is probably not an issue if your neighbor's gr is doing well. You may also have burned the new sprouts with the fertilizer; it doesn't need to be fed until you've mowed it several times. Hope this helps...