I made today 3 pics..it's 3 weeks old by now,it has 12 cm in height

I'm wondering when I should do some pruning and where...what do you suggest for me? and how long should I keep in veg stage?
Bongolius Reviewed by Bongolius on . My First Grow - New York City Diesel Greetings to everyone,smokers and growers I have here 3 pics with my first NYC Diesel plant grow... I made a PC Case and I grow it inside.These pics are taken yesterday after 19 days from germination;it's about 10 cm tall by now.Can someone help me with some information about pruning? from what I've read it's useful in developing branches.I already cut the fist and the second set of leafs and I cut them close to the main stem. I use 4 Phillips CFLs of 27W, 3 daylight and 1 yellow Rating: 5