Hello I am a first time grower and would appreciate any advice i can get for my girls. Here is the grow info. They have some tip burn but also they have tiny yellow edged brown spots concentrated at the leaf tip and then spreading out as they get further down the leaf sort of uniform. I cant tell if its a deficiency due to lockout or just nute burn. I suspect multiple problems. I know its not spider mites.
3x3x6.5 grow tent (non toxic) milliard
600w air cooled tube + hood
6 inch inline fan/carbon filter (filter>fan>cooltube>exhaust)
DWC (4) 5 gallon buckets with no shared rez
ak-49 autoflower vision seeds
advanced nutrients grand-master line + connoisseur
R/O water
week 4 of flower
20/4 cycle , light is about 12 inches from canopy but temps are cool
tent is 82 degrees
water is 68 degrees
about 10 days ago i found some nitrogen toxicity in a couple of them ans i changed all their buckets and just put b-52 and ro water for 48 hours and then went to half nuts and cleared that problem (new growth is fine) but the brown spots still remain and are intensifying on the older leaves and will certainly show on the new leaves in a week.
so lockout? or burn? i have no clue.
like i said im a noob so sorry if i left out any info and thanks for any help you can throw my way
3x3x6.5 grow tent (non toxic) milliard
600w air cooled tube + hood
6 inch inline fan/carbon filter (filter>fan>cooltube>exhaust)
DWC (4) 5 gallon buckets with no shared rez
ak-49 autoflower vision seeds
advanced nutrients grand-master line + connoisseur
R/O water
week 4 of flower
20/4 cycle , light is about 12 inches from canopy but temps are cool
tent is 82 degrees
water is 68 degrees
about 10 days ago i found some nitrogen toxicity in a couple of them ans i changed all their buckets and just put b-52 and ro water for 48 hours and then went to half nuts and cleared that problem (new growth is fine) but the brown spots still remain and are intensifying on the older leaves and will certainly show on the new leaves in a week.
so lockout? or burn? i have no clue.
like i said im a noob so sorry if i left out any info and thanks for any help you can throw my way