For topping you should top it when it has four full nodes and has just started its fifth. Reason being you will be adding stress to the plant by doing it and the plant will be decideing its sex soon. According to Zandor's Grow Report, by topping it at this stage you will help avoid stressed related sex problems.
hbbusa28 Reviewed by hbbusa28 on . 1st Grow Log This is my first grow and I decided to go hydroponic. I am using a home-made DWC setup, your basic bubbler. I am just using some bagseed I had, I am considering this more of a learning experience so it doesn't matter if I get some sensi. Posted pics below. Any suggestions or comments? I am using 2 47 watt 2700k CFL's, 4 6500k 26 watt CFL's and 4 27 watt 6100k CFL's for a total of about 18800 lumens. Rating: 5