Get a scope. I harvested my 100% indica plants 1 at 52 days and 2 at 57 days the first one i chopped when the trics where cloudy 10% amber and the other 2 when i seen 50% amber, the 10% amber pick was not as couch locking as the other 2 and i could use it for daytime, the other 2 are straight up couch lock and will put you to sleep. you should pick and sample the buds at different trich colors and harvest from what kinda high you like. just make sure they are at least cloudy.