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Hay is dried Alfalfa and not the grass you grow in your yard.
2-3 inches
If you grow yours at 7:00pm and wait till the next after noon, you will see tiny bits of grass coming out.
grass
How long it takes a plant to grow three inches depends on the plant. Mile A Minute plant can grow three inches in an hour.
probably a bean plant they seem to grow in a day
10 minutesabout 8 days
About 14 days if conditions are right.
It depends on the type of plant, the amount of sun, the amount of water, and all other variables.
it takes about 2 or 3 days to grow.
It can grow to be up to six or eight inches, but is usually mown down to about one inch by the cats eating it.
15 years