Welcome to the south lol
@TrevorLahey
Im using 2kw oil radiator in the room,and barely i can rise my tempt to 22-23c at night.
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Could run your lights during the colder/more humid hours and off during the warmer/less humid hours
Dehumidifier is also an option, but if itâs humid around your grow then youâll have to dehumidify the surrounding area.
2kw heater is alot. How cold does it get during lights off because 2kw is a ridiculous amount to spend on just heating.
As @Gaz29 mentioned, adding some paper or another kind of dessicant will help a bit as well. Google âbucket dehumidifierâ Iâve used one of these to shave off 5% RH in a 7x11ft grow room so they do work. Youâre only looking to get your RH down to ~60% so youâre already really close to operable RH.
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Cat litter also works. Maybe he could buy a couple of bags and just open them and situate somewhere in the grow area
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i got 2 grow rooms, bigger working in night , smaller working in day. this groom room is 14x10ft with 7x600hps lamps, i got intake fan of 3000m3/h and extraction fan of 4300m3/h. So with these fans i cant run very powerfuly at night time, cuz oitside weather temp is about 9c at night
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Yes this would work Iâm sure of it.
Also how strong and large is the exhaust and how large is the intake?
Having good airflow will allow you to operate at 75%+ RH without much worry.
If you got 4 fans blowing air around you already should have plenty of movement, we just want that air to always be as fresh as possible.
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Does rh shouldnt be ~40% in flowering stage?
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Looks like your going exactly by what the Internet has told you. While itâs true itâs better to have 40% itâs not an absolute necessity. As long as the air is being cycled regular and is moving around the girls you shouldnât have any problem. Lower humidity does mean frostier plants though.
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@Esrgood4u
You know its my third grow, so i dont know alot of things. And yes i got 4 fans which moving air around the room. its seems i need to stop being a paranoid and give them more LITFA 
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Ideally yes, but as with anything we do the best with the environment we have. Also some strains are much more resilient to extreme temps than others.
I donât think Iâve ever flowered below 50% RH, itâs just not possible in my climate without a disproportional investment in heater and dehumidifier.
9C at night outside is way higher than where I am. We have had plenty of nights recently below zero. I grow in a basement and just focus on keeping temps above 18C during lights off and RH as low as I can get it without being inefficient.
By all means if you want to make the investment of a dehumidifier itâs certainly going to bring your RH down to nominal levels and since youâre already consuming a ton of wattage Iâm sure youâre not concerned over the efficiency aspect of running another high draw appliance.
But I do urge you to look through some of the great grow diaries here at OG of plenty of people growing in sub optimal RH and getting great results.
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Yes, im trying to get everything perfect, but its hard to do it eith skills like mine
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Yep but I can understand the worry aspect. Our hobby doesnât come cheap. I have all my plants swaying too and throw so I know I have enough air movement. Your just over thinking stuff. Eventually giving them too much attention will give you problems. I see it all the time with ph and soil growers. They see its best to have a ph of 6.5 for soil so the adjust using ph down when there really is no need as soil buffers your water to the correct ph for you. LITFA is the key. I only see my plants at feeding time and thats every 3 days 
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Agreed. Spend too much time micromanaging the small stuff and youre bound to end up creating issues.
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Way to grow @cannabissequoia. Your plants look mega healthy.
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I think most people over think things because of the thought of loosing everything they have spent there hard earned cash on. I can relate to that. Lights, medium, grow area, fans, nutrients and even seeds all together can run into thousands so loosing a crop is frightening. Itâs is part of our hobby that WILL happen to all of us at some point painful as the thought is. Iâd not allow it to ruin my life though. If it happens it happens.
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Been there too. Biggest lesson Iâve learned is to keep costs as low as possible so failures arenât nearly as expensive lol.
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Not IMO. 
But thanks. 
The skinnier leaved pH 
plant just went into that trial soil mix & looks either burned(nutrient) or some-kinaâ imbalance. (note red purple stalks & weird chlorosis-ish leaf colors) 
But I know what i put in so itâs LITFA mode. To the right are some funny accidentaly F1s 
that also show some kind of weird color blotchiness but not too bad.
Until today that has had zero air circulation & thatâs somewhat fixed. 
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If thatâs unhealthy in your eyes youâd have had a breakdown if youâd seen my white widow auto last grow. What a pitiful state it was. She still ended yielding me 3oz dry though. LITFA has to be the best treatment for any struggling plant
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One of my plants had the same thing happen as in your 3rd pic.
I transplanted her from peat into Batmix and the leaves went weird for a bit, it looked like they were filling up on Nitrogen. It looks mega happy now though.
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