I'm sure there will be debate about this comment but this is how and why I do any trimming. As you can see in the pictures, the leaves are lacking nitro. This is common for many strains to do this while in flowering. I wait until most of the leaf is mostly yellow before trimming it off. I also wait until there are quite a few that need to be trimmed to prevent stress daily by removing leaves as they yellow. I have never had any problems removing these leaves that are very yellow. Never stunted or any other signs of stress. I do not recommend trimming any leaves that are not dead nor dieing. I grew 2 of the same strains side-by-side and trimmed one of them the whole grow because I assumed more light getting and less leaves in the way would be benificial...It was NOTvery sad....

This is from first trim session, 5 weeks in to flower...28 leaves that range from 11"in to 5"in. Most of the leaves came from the main stalk and were the first leaves to develop in growth. This is also very common in this strain.:smokin: