Lemon Auto & Jock Horror: Third Grow

Focus too much on any 1 area and you will overlook the other 8. All 9 cardinal rules of plant growth must run in perfect balance. If any 1 single rule is working at 10% efficiency then it all runs at the10% bottleneck. Cannabis is a "weed" until it flowers. It will grow in almost any condition. What we aim for is optimal conditions for photosynthesis and equilibrium across the board. Light saturation is not the only determining factor in photosynthesis throughput. Temperature or LST leaf surface temperature, studies have shown optimal photosynthesis occurs at 86-87. But be careful as trichomes degrade at 87 and above. Also to note terpenes and flavinoids will start to degrade above 67 so keep that in mind after ripening stage. I personally run ambient 84 with lights on get it as close to your plants until top of canopy sits around 86. Leaf structure and formation look crisp and clean, colors look nice. Try hitting the sweetspot for her Temps, screw manufacturers recommended they just wanna cover their asses from liability. Most distance measures for lights are based off of hid with most guides telling you 77 is best but that's playing it safe. The plant is not here for a long time but she does want a good time. Warm her up and watch those droopy depressed leaves dance. Increase air circulation if you can, extra heat will really push up perspiration, increase water as needed.

Definitely have some chlorosis on the margins. Probably a some micro deficiency. Also looks like potassium. If you want the very best possible bud start growing photoperiod plants. Autos just aren’t there yet IMO Bud looks great tho. I’m not a soil grower so can’t comment much on what you have going for feeds at this point.. but I don’t think castings, meal, n calmag are quite a well rounded feed.

This maybe the end of its life cycle. Its an auto and suggested harvest time is 10 weeks. Your diary is 8 weeks long and only covers when it started to bloom. guessing there is 2-3 weeks unaccounted for, bring you to a total of 11weeks. Check the trichomes on the plant and determine if its ready for harvest. This maybe natural cause of age and it being an auto. I don't know if their is anything you would have been able to do. Nitrogen would affect the lowest growth first and works its way up the plant. Potassium can show in tips of upper growth as well. Good Luck!

this is probably some shitty correlation used to guesstiate THC%. unless you weigh original mass of plant material, than extract and isolate thc, weigh it and divide by original mass, there's no device that can skip these steps to determing % THC accurately... Just as your phone can't be more than a cheap, suspect lux meter no matter what any app says otherwise...