Here is a picture of a plant I did that too I pinched off the tips of each leaf.

1st pic about 2 weeks after pinching
2nd pic 6 weeks (back middle plant)
I only did this because I had a retard that never grew past its first set of 3 point leaves and it is now only 5" tall and is about 2 months old. one advantage it has 3 main stems but won't yeild much. The other plants are all 2 or 3 times the size and weeks younger. So it's up to you! I've been told it will be a potant plant but that remains to be seen. -Good luck