There is no exact length. Each person's hair is different in growing patterns. Most hair will definitely get over your head, but how fast, it depends.
how long does marijuana stays in hair if you only use it two and half months ago
two months or more.
Depending on your hair, it could take 2 - 4 months.
Ideally, if you want short healthy hair, trim every six weeks - every two months.If trying to grow long healthy hair, trim every two months - every three months.
how long does weed stay in your hair if you only use it once month have not use in the last two months
well it'll take 3 months to grow your hair in 3 months
9 months
Drug stay in your hair for months together.
it depends ow fast your hair grows
It actually depends on the person. But normally it grows 3 or 4 inches in two moths. It could be longer or shorter.
About 3 months.
about an inch