I'm not convinced it needs it at this point, If you can use some more LST training techniques that would be an option, your plant is just under a foot high if the diary is correct. If you wanted too defoliate and plan on going through with it. grey_wolfs answer is true. Air flow and light penetration are why growers defoliate. however I know that another user on this site organoman thinks striping any leaves off of a plant is wrong and would say don't. I'm a bit divided on it and think it should only be done in rare cases when LST is not an option and only when there are to many leaves cause issues with airflow.
Good Luck!
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