Lst?

Hey there all had a few questions on possible LST or something along those lines...

My ceiling is about 5'8 i just put my clones in my room, ive got LSD and a Northern Lights.. From what ive read NL likes to stretch a bit.. well id like to make it bushy and and get as many buds as i can on it with the low ceiling i have.. here is a picture to give yall an idea where im at. then maybe you all can give me some ideas on where to start with it and when i should start doing it.

LSD 5" tall><NORTHERN LIGHTS 6" tall

Check out main lining. It's good if you have a strain that doesn't branch much. https://www.rollitup.org/subcools-old-school-organics/542308-main-lining-thread.html

The main thing is to tie tops down and the shit below the top will start to grow out.