YOU SHOULD STOP COOUNTING DAYS AND BUy A MICROSCOPE.
55 days is not a must, you could have white widow plants and have cultivate them for more than 10 weeks.
with a microscope you could see the thricomes turn from crystal to pale grey and then to amber colour
you should cut the plant when there is a mixture of grey and amber thricoms ( if all are gray you'll have a short high, if they all turn to amber youll be stoned) + you should always give the plant 2 days darkness before and after the 12/12 cycle .
the reason for this is because the plant will think its dying and will generate itself to create more pistils, and youll be a happer panda
kill some plants and kill some more, smoke shitty weed but its your shitty weed . its like sex, you cant perform 70 pages of camasutra when youve just lost your verginity ...it takes time effort and errors . thats why hippies never had anything big to do, growing weed is a full time job when done correctly
hope it helped