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Cool the room to 94F and run your cannatrol. The simplest solution is sometimes the best. But weed and engineering overly complicated solutions do go hand in hand.

An insulated room with an air conditioner mounted in the wall would do just fine.

Nah, the compressor is too aggressive. It’ll drastically swing the temperature down and humidity up within seconds causing condensation in a high humidity environment. Placing a humidifier inside such a small space would swing the temperature right back up in seconds requiring the compressor to...

That is the best you can do this late. Still looks very decent. Nice work! They might finish a bit early or continue to thrive for weeks and weeks. Either way those large fan leafs are less important at this stage. Let them fall.

Well you didn’t get those massive colas under feeding. Could be over feeding, or wind/fan damage. Those leafs are clawing hard, so I’d bet you went a little heavy on the nutrients. I’d pull back the light a bit, minimal feed, and make sure no fans are blowing directly at the plants. Let them...

To me it looks like your brighter light caused the buds to swell nicely. The larger but NOT large non-serrated leaf's are normal for high intensity LEDs. Your nodes increase in density the more intense the light. That also feeds those smaller leaf's in each node.

Wet feet and slimy roots fits. It is also easy to check. Sacrifice the worst plant and examine the roots. It is totally possible to over water coco. I have had a few plants where the root growth was so dense that the water runs down the sides. The bottom of the pot just becomes a soggy mess.

You’ll get there. I suggest reading other peoples struggles throughout the forum. It helped refine my process. My current run is close to yours. 50/50 coco/perlite. 700ppfd. GH Trio at 1.2 EC varing the PH 5.8-6.5. 80F with 50-55% RH. The only difference is I water just CalMag at 300ppm between...

He is watering with run off. There is no build up of nutrients. The plants take what they need and the remainder is washed away with the next watering. Best advice- look for advice from coco growers. It is a completely different animal.

Take a hike. He said Canna A+B to 1.3 EC total and watering until runoff. Plus his light is nearly in the ceiling. Are you purposely trying to ruin this guys grow?

Right on. Poor plant transpiration creates a ton of secondary symptoms. Pulling your light back further might help/mask the issue. A healthily plant can be blasted with well over 1000ppfd when you have everything dialed in.

Below is the VPD chart I use. Looking at your current stage of growth I would aim for under 60% RH. 1.1-1.3 VPD feels about right. I find it better be slightly lower on the RH. They tend to drink more and grow faster because of more frequent fertigation.

As a coco grower. My observation is It looks too wet. Your RH and temperature seems a bit high. They can't transpire properly in those conditions. I'd drop the relative humidly to around 50-55% at this stage of growth. I'd also dial back the watering frequency. Let things dry off but don't let...

Agreed. But this kind of condescension is not a reason to not use one.

Don’t cheap out. There are so many bad low efficiency Chinese made LEDs out there. The reviews are typically fake so never trust them. A cheap LEDs will waste your time and money. Do your research or just drop a little extra cash for a reputable brand.

I would flush the pots with 1-3 gallons of your current week feed and calmag. Too much water won't matter. It'll run off while cleansing the medium. The remaining liquid will buffer your coco sponge at that exact PPM. Also, since your root ball is not formed in that large pot, you will have to...

Don't let pure coco dry out too much. Your PPM and EC will sky rocket in the medium as the percentage of moister decreases. Think of it like a sponge in your sink, after you do the dishes and let the sponge dry out it becomes encrusted in crap. Coco requires frequent buffering aka watering until...

Chop that old girl down. All of it. She is not long for this world.

I would chalk it up to adaption. Potting soil tends to provide patchy nutrition until the root ball is sufficient size. The initial roots can land in what is considered hot parts of the soil and create the look of excessive nutrients. Or the opposite and land in perlite dense zones will little...

Coco is not great for beginners. You will find differing information everywhere. I keep my PH around 6 in Coco. I never feed more than half the manufactures recommendation. I water until I get 20% run off and water with plain water every other watering. I also use calmag in addition to the...