im not sure when exactly you can clone but id say when you think your plant is strong enough to go cutting branches off at the nodes. id say a month or two into vegetation. box looks good, did you use aluminum foil or fire blanket? you should spend a fewbucks to throw a thermometer in there so you can see how hot it gets, and a friend told me to spend the money on a baromiter. i like how mine i could keep moving the light higher up so it was always two inchs from the top of the plant. ive already planed on recreating the growbox in an old chest i have in the attic, with fire blankets, a fan inside, maybe a few nutes and best of all, a LOCK. good luck with your baby