Should I BE TRIMMING? Cause I don't....

I have never really trimmed my plants. Should I be trimming them?

I grow a SOG type style growing. I just let them go and figure it'd yield more this way... not sure though.

Do not trim anything, except the bottom 2 or 3 branches that don't get much light , and to get a little space at he bottom to nicely circulate air down their You fan leaves draw in the power to power your herb.

I don´t trim my plants while they are growing. Leaves go yellow and die as necessary all on their own.