Night time humidity in flowering tent

R

RadicalRoss

Well-Known Member
So I've got my temperatures and daytime humidity pretty well dialed in on the flower tent, but the issue I'm seeing is that over the course of my tent's night cycle my RH will slowly creep up as the temperatures drop.

I'm especially noticing it today, which has been very cool compared to the rest of the week and so my AC hasn't been running as often. On warmer days, it will get up to ~55% and stay around 50% when my home's central AC starts kicking on, today it has spiked up to 60% RH, not sure if it will stabilize there or what will happen without AC intervention... During the day my RH is around 40%, the humidifier has to do just a little work to keep it there but I can get two full days out of the quite small reservoir.

I guess my question whether or not this is something that is worth worrying about. I have good air circulation in the tent, with an oscillating tower fan and a large fan on the ground, so I'm not super worried about mold or mildew, but I'd hate to be surprised on this front. Would a small dehumidifier be appropriate in this circumstance, and if so does anyone have a recommendation?

Tent for reference, yes I know I am drastically under-utilizing my space. I didn't intend on having a 4x4 to flower in when I started this venture, my next run will use the space much better but I needed to flower these girls to make room for the plants coming behind.

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You should be fine. Anything over 70% for any extended time would be concerning. Just make sure the fans are on 24 hours not just lights on. Good airflow will help prevent a lot of issues.
 
Just a tip for the next run. You can keep things a lot more stable by running your lights at night. It keeps the temps down during the day in summer and keeps them warmer overnight during the winter. You can also water / feed at lights on and they will dry out before lights out in the morning.
 
buyyouabeer said:
Just a tip for the next run. You can keep things a lot more stable by running your lights at night. It keeps the temps down during the day in summer and keeps them warmer overnight during the winter. You can also water / feed at lights on and they will dry out before lights out in the morning.
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The lights run from 2000-0800, with my girls asleep all day. I get cheaper electricity overnight, as well as it helping with the heat issues you pointed out. I sleep with it pretty cold, so the AC tends to run a lot overnight and keep my girls at the proper temp.
 
RadicalRoss said:
The lights run from 2000-0800, with my girls asleep all day. I get cheaper electricity overnight, as well as it helping with the heat issues you pointed out. I sleep with it pretty cold, so the AC tends to run a lot overnight and keep my girls at the proper temp.
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I do the same. They sleep til 9pm and then on til 9am. Ac running while lights are on. Humidity controlled In the tent room by the AC. I se the temp for 71 and RH usually sits around 49% in the dark. 55-60% with them on. I’m comfortable with that. If it gets too high I open more vents and turn the AC up.
 
HydroKid239 said:
I do the same. They sleep til 9pm and then on til 9am. Ac running while lights are on. Humidity controlled In the tent room by the AC. I se the temp for 71 and RH usually sits around 49% in the dark. 55-60% with them on. I’m comfortable with that. If it gets too high I open more vents and turn the AC up.
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It is crazy dry in my house, just a random room usually sits at like 40% these days. May change with the seasons, I hadn't really paid any mind until I started growing.

AC finally just kicked on for a bit and sent my tent down to 50% RH, lol. I probably just shouldn't watch it so closely.
 
Paranoid much? Lol if you wanna keep it consistent get a small humidifier. Set it to like 55% and keep exhaust dialed in to help maintain that.
 
HydroKid239 said:
Paranoid much? Lol if you wanna keep it consistent get a small humidifier. Set it to like 55% and keep exhaust dialed in to help maintain that.
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A bit of paranoia, but more impatience. Plants grow at the speed they do, but my brain is always wanting to fiddle with them and give them the best environment I can.

I doubt I'll bother with a dehu, people's responses were pretty comforting in that regard. If my plants won't mind a slightly more humid night, then I don't see why I should.
 
HydroKid239 said:
I meant a humidifier... did I say dehu? Lol I smoked since I was last here.
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Nope, you said humidifier and my stupid brain read dehu. I need to smoke, apparently, to get my brain working right, lol.

I've already got a little humidifier in there, it gets very dry when the lights are on without it. Tent averages like 42% RH, so the average is pretty spot on I just get some minor increases at night.
 
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