When you're having a hard time reading your plants, a soil test can help point you in the right direction.
In my case I now know I need to add dolomite lime for both calcium and magnesium to my top dressing. Where as before I was all over the place with trying to guess what was wrong because it looked like so many different things at once.
I'm also going to add some feather meal to my top dress because I'm seeing a bit of yellow in my larger fan leaves too early in flower. I'm at day 48, and they are noticeably yellow on 3 plants. (See? I'm reading the plants too.)
I'm not saying everyone needs to test and test religiously. But they can be helpful once you understand what they are telling you. That's why I started this thread. Because I didn't understand at the time what the test was telling me and I was having a hard time reading my plants. And as great as this place is, if you ask for opinions on what's wrong with your plants you'll get all sorts of answers with very little consensus.
I now know more about what I need than before. And that helps make me a better grower.
Day 48 of flower? Wow. My cultivar was finished by day 49.