Usually I defoliate on the 21 day of flower, I also use scrog so it works great for me.
I wonder if it's a good idea to defoliate again in later stages before I reach the end of flower?
To increase yield and maybe save some work at harvest.
What I have learned is doing major defoliating late in flower takes away their ability to transfer power. And make bigger buds So now I only defoliate bud sites that are being covered by leaves late in flower . Plus late flower defoliating stresses the plant out slowing its bud formation