If it's from seeds, it should take 5 to 10 days. Keep the soil moist during this time.
Dead grass does not grow back. It needs to be removed and replaced with new grass seeds or sod.
Cat grass typically takes about 1-2 weeks to grow to a suitable height for cats to enjoy.
About 14 days if conditions are right.
Possibly years.
Grass seed typically takes about 3 to 4 weeks to grow 3 inches tall.
15 years
Grass typically cannot grow on concrete surfaces because concrete is not a suitable environment for grass to take root and grow.
it takes about 2 or 3 days to grow.
yes
.....grass seed needs moisture....I don't think that milk would cause it to grow any faster, or any slower than water, as long as it is kept saturated until it has sprouted.
Yes, grass can grow in 50-degree weather, as long as there is enough sunlight and water available.
It depends what species they are, an albino grass snake would not grow as long as an albino anaconda.