I was just wondering if anyone knows what is turning the leaves on my Gorilla Glue #4 black? They are 8 weeks into flowering under Spider Farmer 4000 LEDs with GH Flora Nova nutrients dosed at 1 tsp/gallon given twice weekly. Thank you for any insight.
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Not sure but i had a very similar thing happen to me and i narrowed it down to the fact i was giving them to much Blackstrap Mollasses.Yours looks more like something genetic.Whats your temps,day+night.Grow tent=120x60x150 for veg,300x150x160 for flowering
Current grow=4x dwarf autos,
Medium=coco/perlite 60/40
Nutrients=canna a+b plus calmag
Lighting=2x110w QBs for veg,2x600w hps/digital+dimmable for flowering
Ventilation=Small tent 2x4" ac infinity fans and 2x rhino carbon filters Large tent 8"ac infinity fan+filter.
Circulation=2x6"oscilating fans in smaller tent, 2x8" oscilating fans and 12" static in large tent
Pots=12l fabric
Temps with light on 23-24c,lights of 17-18c -
I would go with anthocyanins here, genetic disposition, I've had this happen with plants. here's 3 that went dark: Golusa, Sugar Candy, and Forte Noire.Attached FilesComment
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Temps down into the mid to low 60’s during lights off has brought out the strains colors. Perfectly normal and preferred in my tent. Looking goodComment
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Awesome! I agree with genetics.Comment
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My temps get down to 60 at night with high 70s during the day. Genetics makes sense to me with how great the plant is looking otherwise, aside from the tiny buds. I’ll update if the plant starts to show signs of struggling. Thanks everyoneComment
my tent with the door flap open will stay in the mid 70's lights out an zipped up will be in the low 60s. I think it is way better than very warm. It may just be slowed down a tad time wise but not as harmful as too hot. Great looking plants 
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