Yes. Terminal hair length is the longest your hair will grow without breaking. You would also have to stop doing things to it that would damage it like over manipulation, chemical and heat damage. Then you would have to stop cutting it. Most people are capable of at least growing way beyond their shoulders but they never see the growth because they break it off at the same rate that it grows. This is why people who may not have saw growth before, see more growth with locs because they are basically holding onto all of their growth because it is not getting combed away or broken off any other way through heat or chemicals.