Hi mate,
The idea behind LST is to bend and otherwise gently manipulate cannabis so your plants create multiple main "colas" or buds. Additionally, Low Stress Training lets you produce plants that grow in the exact shape and size you want, giving indoor growers much bigger yields from the same grow lights.
The LST technique can be used to reduce the height of marijuana plants that are getting too tall for your setup, or are growing taller than your other cannabis plants. LST allows you to keep an even canopy and get as much bud as possible from your light.
You can use some gardening string/ or ties of some sort. Or just some old shoe laces you’ve got laying around, just be careful how tight you do them. Few little examples in my Stardawg and girl Scout cookies diary if you want to have a look. Just opening up the plant to let more light in and expose the bud sites. Which means bigger buts. You can defoliate if bigger leaves are blocking bud sites lower down the plant. Take a look st my diary and it may help you and give you a better idea. Hope this helps bud. Take it easy