Im not sure what is going on here, thought it was light burn 2 weeks ago when they showed initial signs so i raised my lights and turn them down, also top dressed with1tablespoon/gal 4-9-3 and 2 tblsp of crab meal about a week ago.
;Growing 3-platinum putag punch 1-valedictorian and 1-mystery seed
;plants are in week 6 of flower
;using oceans forest and topdressing with down to earth amendments
;pot size 10 gal
;grow area 4x8x6’6” with 2 mars ts1000 lights dimmed to %70 and about 24” from main canopy
;temp steady 78 degrees and 52-58 rh
;doing a natural grow so iv not checked soil ph or ppm
;minor knat infestation that im working thru
;watering till i get run off usually 1.5-2 gal every 2 days
Using recharge every 7-10 days
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Looks a lot like symptoms of nitrogen toxicity. Also, is that a heater next to your plant? That might be doing some damage as well.