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cupping is spreading throughout the entire top canopy of all 4 plants now and leaf tips are still yellowing and some leaf tips are purple now. I did a flush and that didn't correct the issue, I turned my lights down and lowered temps and increased humidity and that didn't stop the problem. I am...

cupping is worse and tips of leaves turn yellow or purple

so the temps and humidity is not the problem! They have just got worse as the cupping is have moved across the entirety on the top canopy and some slight yellowing and as you can see tips of that leaf have turned purple???? like wtf... I need help

Do you want to maintain that vapor pressure deficit throughout flower or what? I could see alot of issue's with mold and mildew with big buds sitting in 70% humidity

There we go!!!! That's what i needed baby. That's why they are looking better now

Also on the new growth (small new leaves growing from nodes the leaves were having necrosis like copper spotting)

I hear what you are saying but it was getting bad. That plant looked horrible about a week ago untill I pruned the plants. I wouldn't have worried but more and more leaves just kept getting more and more yellow and dry. There def was something going on that I had to fix or my plant would have...

updated pics from today

you don't see the leaves canoeing/cupping and yellowing??? I'm pretty sure I have it taken care of now as it seems to have stopped

Since I pointed the fans to the ceiling and keep foliar spraying the plants the last 2 days I have def noticed they haven't got any worse for sure. I did a pretty major pruning 2 days ago to open up the center of the canopy and lollipopped almost fully, I will prob lollipop a little more once I...

you are exactly right and that's what I keep saying lol.... the problem is a combination of heat, RH, AND WIND. The issue is not that my temp is too high its the temp with the wind and RH creating a condition the plants don't like. That's my description ^^^

last night it was 50% after turning off fans blowing straight down on canopy n foliar spraying so I'm sure it was a bit lower before but I didn't have my hygrometer in the grow room

I am sure the temps are ok but here's a pic of the leaf issue. It only effects 2 of my 4 plants

it gets plenty of fresh air from outside and fans and 80 is the high temp

my room is not too hot. It runs at 75-80 degrees. I'm thinking it's a combination of those things causing the issue

yup that's exactly what I did. I turned them so they are pointed up towards the ceiling so they are pulling air out of the heat sinks and exhausting it upwards instead of having it blow right on the top of my canopy

that's exactly what I said I did lol I turned down my 450w led in the middle of the room and pointed the fans up towards the top of the grow room instead of.down at my plants and have been foliar spraying all the plants to raise humidity

I did a flush a few days ago (very thorough flush) thinking I had a ph issue but the 2 plants don't seem any better so now I'm trying this out. Btw soil is about 50% leaf litter compost, 30% peat moss, and 20% perlite. Only 2 of the 4 plants are displaying symptoms

Also light are 24 inches from top of canopy only up untill recently and started at like 32 inches away so im sure lights are not too close Expecially since I have used these lights before at heights as close as 15 inches with no I'll effects

Does anyone have any experience with heat, wind from stationary fans blowing straight down on canopy ( they are desk fans hung next to my lights pointed straight down) btw now thinking about it the air is probably pretty warm because the fans are hung right beside the heat sinks from my LED...