maturity is usually at 2 years about.
they are fully locked earlier, but not fully mature.
this varies for the individual.
6 months to a year
At least three or four inches is good to start with, but the longer they are, the better it is. African hair typicaly 3 inchs is enough. You can start dreading your hair when it is less than 10 centimeters (4 inches) long.
Round about 80-90 cm give or take : D
Boys can take out their dreads, if the situation requires them to. They can be taken away by shaving or if they are temporary, they can be undone.
a nail takes about 100 days to fully grow.
He never had his hair in dreads it was braded
dreads are awesome but it's a real commitment. only get dreads if you know you will still like them for at least a few months. you can take them out without cutting them, but it can be a lot of work to put them in and take them out and you will hate doing it.
about 8 weeks
about an hour or so
1hr
about a half hour
5 hours