i've had 2 harvests so far and wish i had let both of them go a couple more weeks. the first one i was over anxious. the second i ceased nutrients too early and the buds plants were really nitrogen deficient, then i got anxious and chopped. the good news is that both crops were still really good smoke. i think an early harvest just makes the buzz a bit more jumpy rather than couch-locky(jumpy is better for me anyway). i think a good rule of thumb, for me anyway, is i am going to wait until i think i should harvest, mark my calendar and then chop it a week or two after that...