The nitrogen uptake has a lot to do with it but the plants genetics caused it to flower and maybe that process has contributed to the nitrogen deficiency. I have tried feeding additional nitrogen to my supersoil grow which in theory, would not need the additional nutrient. It had helped to stalled the yellowing but also slowed the bud development at the same time. I have had two other autos do the same yellowing process and I had decided it’s just something I have no control over as these plants are on autopilot in an ideal environment. Given the development of every other specimen in that attempt, it seems to obvious and easy to just blame it on the plants own internal changes. Possibly something I did in that grow caused the nitrogen uptake issues but I have no way of knowing.
i want 40% or more amber trichomes and I wait as much as 3 weeks longer than what may be considered for harvestable plants. With that yellowing and drying of leaves, it makes it hard to maintain a viable plant while it’s looking to whither. Trimming is surely easy but I have yet to test anything grown in that manor. Depending on your ‘experimental†nature, look inside the buds with a good magnifier and see where you are in the growth time line for you. You may need to waste a small bud to cut into the center and check it out thru and thru. That’s about the best I’ve got so far, sorry