My take on this? It's BS.

The only thing that an extended dark period will do is inhibit florigen re-uptake, which would seem to maybe encourage a final burst of sexual expression- but then you kill the plant well before all that florigen can do anything.


What actually happens is that the grower doesn't SEE the plant during this black-out period. We all know how quickly things move near the end- A couple of days can make a big differance.

It's kinda like leaving your puppy behind while you go on vacation- said pup is going to be noticabley bigger a week later. If you hadn't gone away, you would have seen the pup every day, and wouldn't have noticed.

Also, that dark period is one last chance for mold to spring up when yer plants are at their most vulnerable, so if you feel like you have to do this, leave the fans running.