Not practical at all.
Undue stress issues aside, maintaining a regular photoperiod is nigh on impossible unless you have an alarm clock telling you to go switch your paper bag. Plus the size of plant that you need to have these large low branches- a plant that big is mature anyway and should be preflowering, or at the very least, you should already have taken clones off it to sex in the traditional manner.
Cloning for sex is the right way to determine sex without flowering your whole plant.
stinkyattic Reviewed by stinkyattic on . Early sexing method What does anybody think of this? I came across it in a grow guide from Weedfarmer.com ive never heard of it before, anyone out there have experoence wit it? EARLY SEXING It's possible to tell the sex of a plant early, and thus move male plants out of the main growing area sooner by covering a plant's lower branch for 12 hours a day while it's in a constant light vegetative state. Use a black paper bag or equivalent to allow for air flow while keeping out light. Be sure to set up a Rating: 5