thanks for your input, leaves(2) are fading to yellow, can't see any bugs or nute burn, the strain i'm growing is swiss cheese, bud xl stopped, i thought of stopping bud xl because of the (N)( 0.4%) as I'm in the flowering stage,yellowing leaves late in flowering is normal. How long does your strain take to finish? I'd stop using the budXL for the last 1-2 weeks.
Also, are they just fading flat yellow? or are there brown spots, decay, or leaf crinkling/curling? What color are the leaf stems?
Senescence is the plants way of preparing for it's final days. The process is really kind of interesting in that as a part of senescence, leaf abscission occurs, where the leaves stop producing chlorophyll, and the petiole actually scars over where the petiole meets the stem so that the leaf can drop off on its own without leaving an open wound on the plant. Senescence is triggered by hormones, and once the hormones are triggered, all the food in the world isn't gonna save the plant from it's eventual fate. However, we generally harvest at peak bud ripeness, before the hormones that trigger senescence are released so we rarely see the "fall colors" unless we induce them.yellowing leaves late in flowering is normal. How long does your strain take to finish?