High Marihuano,
There are 2 reasons why someone would use defoliation on cannabis plants.
1. To create airflow between the leaves and buds.
2. To cut away small buds at the bottom that use energy that could be used for the larger colas. And leaves at the bottom that don't catch enough light.
Your plants don't need defolation to create airflow because there is more then enough space between the leaves and buds.
But you can defoliate the lowest 30% of your plant (leaves and buds). So that they only focus on the highest buds that catch the most light and for that become the fattest.
You want your plants to product those fat, thick and juicy buds. And this way you get rid of all the small popcorn buds at the bottom that use energy that should have gone to those fatties.
Happy Growing! 😋