I top at 3rd node,and then top until i have about 8 tops then i fim until flower.
http://www.youtube.com/watch?v=btX3l44flps
http://www.youtube.com/watch?v=YeR_p6EkvvA
http://www.youtube.com/watch?v=u0gr4Bez3Xg
these are 3 videos on topping from grow420guide. This is how i've learned 90% of what...