SBR is right it can be a PITA...but if it makes it, It can be a room full of clones too ! Make sure it's worth it. I've found the best way to reveg a plant that has flowered, is to basically leave it alone and be patient . No ferts, little water (over watering will doom the plant), air for the roots,18/6 photoperiod, and find a space that it can sit in for at least 30 days. When I reveg my regs that have been sexed, it's important to make the determination on sex early as possible, reveg can be as easy as 10-15 days under 18/6 !