The earliest to top is around the fourth node. Since you have 5 you can top. I would only suggest topping if you have a limited grow space. Any stress you can avoid then I suggest you avoid it. Also, as stinky said, wait till the nodes alternate and the preflowers show. Then your plant is ready to flower. The wait is well worth it in the finished product.

Happy Toking :rasta:
kush07 Reviewed by kush07 on . Can I Turn Lights to 12/12? ok i got a 2 1/2, 3 week old plant. i want a VERY small first grow. i started with seeds so i know i have to wait longer then if i had clons. right now im growing my 5th true leafs. is it time? i figured give it another week then turn to 12/12 but what do yall think? Rating: 5