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DeaneR started grow question 3 years ago
My upper leaves? Is this light scald? Or a nutrient imbalance? This has been coming on over the last week. The older shaded fan leaves appear healthy. Also the one bud on the far leftside, furthest from the light is less affected. Her tent mate gets the same light and nutrients.:confused:
Blue Cookies ;) Photo.
17 weeks
Blue Cookies ;) Photo. DeaneR
Blue Cookies
41 comments · 3 years ago
Week 10
Leaves. Other
TheBudWhisperer answered grow question 3 years ago
Hey dude, awesome photos and great grow to date:+1:. I’m seeing potentially 2, possibly 3 issues here but it depends on what your referring to and leads to a couple more questions. #1 - if ur talkn about the mild variation in leaf colouring it could be a slight light burn issue. given the height of your light though and the other thing I’m seeing, I doubt it. If top growth gets progressively paler and the edges and tips start to brown and crack yeah this is it but too early to tell at this point and height is good. I’m def. leaning towards a nutrient issue - lockout specifically. You’ve got minor initial signs of burnt tips. I think the fix (at least where you should start) could be simple too. Ur running your ph levels at 6.5 and have been for a number of weeks. In a coco medium this is an acceptable part of the range but definitely at the very top of it. I’d drop it back down to 6 and wait and see if the issue progresses. You recently added more nutes to the mix so it does make sense. A slight drop in ph might help the nute uptake and you may not need to dial back the concentration at all. Again, very early stages and either/or can be easily corrected at this point. Overall, the grow looks fantastic, really good call on the scrog nets attaching to the pots and best of luck through flower:+1::facepunch:
Hattrick answered grow question 3 years ago
Hey brother, running same strain about two weeks behind you but in H/Frog soil but when I ran those into same issue it was from an increase in nutes but running different mediums I’m not sure. One more thing if leaves are sawing at each other from the fan it can cause that brown color but can’t tell for sure in the pic
DissNoof answered grow question 3 years ago
Hey DeaneR, Looks like magnesium deficiency from the yellowing between the veins of the upper leaves. this could be due also to lighting and heat issues, so make sure you're at the right lamp to plant distance and keep the environment cool , maybe with an "evaporation cooler" for next time. Hope this helps ! :rocket: