Not sure if this is your question but the theory is that the plants think that the world is coming to an end for at least the foreseeable future. No light! Oh shit, we are toast! So they produce like crazy to ensure survival of the species.

I'm interested in hearing from some gurus on this. Ice water? 72 hours of darkness? Is it meaningful?
bigsby Reviewed by bigsby on . how many hours of darkness before harvest? was wondering what the rule of thumb was? some say 24 some say 3 days. also is there a difference with autoflowers? Rating: 5