Do NOT put your plants into flowering then back into veg--------much better way.

Pre-flowers indicate sex long before auctal flowers form. Look closely at the internodes and you will see either little white strings (looks like fishing line) those are female. Males look like itty-bitty balls.

This appear around 20-30 days in veg.

The fastest way is to take cuttings and apply 12/12 light-------don't even have to have roots first. Floros are fine for this purpose.

Always take cuttings before flowering begins----even a couple of days of 12/12 sends the plants into the flowering cycle.

A~