hello every1.. i have a 4x5x8 room with a 600hps how tall should i let these 2 strains grow b4 i flower?

if you can tell me anything on theses two strains would be great..
thanks
fasts102376..
fasts102376 Reviewed by fasts102376 on . need some information about blueberry and white widow hello every1.. i have a 4x5x8 room with a 600hps how tall should i let these 2 strains grow b4 i flower? if you can tell me anything on theses two strains would be great.. thanks fasts102376.. Rating: 5