Have waited as little as a week, but I think you should wait 12-15 days just to make sure especially if you are new to this. Best of luck friend.
razzapiggy Reviewed by razzapiggy on . Just Topped Plants...How long til 12/12? Ok so i topped a few of my plants yesterday because i wanted them to bush a little better...how long should i wait for the plants to heal up before switching to 12/12 in order to get the healthiest plants...a week, 2 weeks, 3 weeks? i'm unsure because last time (1st grow) i topped one and switched to 12/12 and the stems were very thin and my yield got crushed...how long after topping a plant can one begin flowering so that yield is increased not decreased? Rating: 5