A full grown chihuahua takes about a year and a half to two years.
as long as a banana
It is not actually a horn, but a tooth, and it can grow up to 9 feet long (no joke)
about two to three months.
it can be grown everywhere as long as you have the seed.
6 Hours
That would depend on if your a child or not. you have two sets of teeth in your life time, when you are a child and lose a tooth an adult tooth takes its place, if your an adult and lose a tooth it does not grow back.
A narwhal's tusk, which is actually a long, spiral-shaped tooth, can grow to be about 9 feet (2.7 meters) long.
About a year and a half.
you have to have certain genes, my hair grows an inch and a half in a month. but it will take about half of a year to grow it really long
It usually takes about from six months to five months.
Most teeth are of fixed size except in rodents and elephants.