Mendo - not talking smack at all here, but only 5 from 400's? I have gotten just under 4 from a 65 in the past. However like you said, you can only run 25 so might as well beef up the dirt and squeeze as much as you can per plant.
Also, I am sure there is a big difference between 4 and 5 #'s from a plant. Kind of like the difference between a 9.0 and a 9.1 earthquake. Much bigger difference than a 3.0 compared to a 3.1. Once you get up to that level, everything has to be perfect to squeeze out more yield.
Everything I do is a proprietary secret.
But all organic!
compost tea every week. Basic ACT recipe. EWC, bat and seabird.
foliage spray 2x a week. Lately I've been "juice'em"
I separate out a lot of larf. I am ruthless. My trash is what some people would put in.
I love me some bubble hash!! which is why my bubble is so good!
I have well amended the dirt with all things organic.
organic makes a huge difference.
This year I hope to do better. Its a long season lots can go wrong.
Your plants are huge, I dont stop by your thread that often because it makes me feel bad about my garden Not really but shit......good work.