Relative Humidity

ebcrew

ebcrew

Well-Known Member
My relative Humidity is almost always under 50%. Does anyone have any recommendations on how to increase this or am I forced to buy a humidifier. I was hoping there were some homemade remedies but Google didn't provide much for me.

It is a closet grow, with sliding mirror doors. grow is about 5 feet from shower/bathtub also a window in shower. I'm in a very humid climate.
 
booms111

booms111

Well-Known Member
ebcrew said:
My relative Humidity is almost always under 50%. Does anyone have any recommendations on how to increase this or am I forced to buy a humidifier. I was hoping there were some homemade remedies but Google didn't provide much for me.

It is a closet grow, with sliding mirror doors. grow is about 5 feet from shower/bathtub also a window in shower. I'm in a very humid climate.
Click to expand...
What is your humidity level peaking at during bloom when lights are out? If it's 50% lights on and temps go down 10f degrees when lights out your hitting more then likely 65% When lights out if not using any kind of humidity control. I'd not stress the 50% humidity, you will be fine there, I'd be more worried about what's happening during night cycle. Keep things simple.
 
Renfro

Renfro

Well-Known Member
You are in a humid climate, what is the temperature outside? When you warm air up the RH% drops assuming no water was removed from the air.
 
Renfro

Renfro

Well-Known Member
I honestly wouldn't be concerned with raising your humidity. As the biomass increases it will transpire more water raising the humidity.
 
GBAUTO

GBAUTO

Well-Known Member
I live in the Smokies and the RH NEVER drops below 50%.
I suspect that your instrumentation isn't accurate.
 
Renfro

Renfro

Well-Known Member

Why does my humidity spike at lights out?

I thought this would be helpful for some. Three things are at play, major factors anyways, aside from ambient humidity and whatnot. 1) Biomass - As the plants grow the amount of water respired is directly proportional to biomass. When the plants hit a certain size (I like to call it critical...
www.rollitup.org

There is some information in that post that will help you better understand how humidity works.
 
ebcrew

ebcrew

Well-Known Member
Kingrow1 said:
Your in a humid climate yet have low rh? Is your humidity meter in the light? :-)
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My HVAC system does a good job. Yes humidity in my house is always around 50%. Yes the meter is in the light. I have 3 meters so ill try them in different areas. I never thought about that.
 
ebcrew

ebcrew

Well-Known Member
GBAUTO said:
I live in the Smokies and the RH NEVER drops below 50%.
I suspect that your instrumentation isn't accurate.
Click to expand...
South Florida here, could be im using a readily available AcuRite temp/humidity sensor and 2 more off brands of the same meter.
 
ebcrew

ebcrew

Well-Known Member
Renfro said:
You are in a humid climate, what is the temperature outside? When you warm air up the RH% drops assuming no water was removed from the air.
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Temp outside right now is 81. Its Florida so it rarely ever drops below that.
 
Renfro

Renfro

Well-Known Member
Well it's very likely that as your plant grows you will be needing some dehumidification so don't bother getting a humidifier.
 
Kingrow1

Kingrow1

Well-Known Member
Why are some saying airflow mitigates humidity - there must be a reason or some scientific principle at play....?

:-)


Renfro said:

Why does my humidity spike at lights out?

I thought this would be helpful for some. Three things are at play, major factors anyways, aside from ambient humidity and whatnot. 1) Biomass - As the plants grow the amount of water respired is directly proportional to biomass. When the plants hit a certain size (I like to call it critical...
www.rollitup.org

There is some information in that post that will help you better understand how humidity works.
Click to expand...
 
C

Chesspoker84

Member
Humidity is way overrated! Maybe the most overrated factor in growing. You just have to know 2 things about that: If you have non-rooted clones, you need a high RH, so that they can get their water with their leaves.
in mid- to end flower a high RH will very likely cause budrott, under 60% is here a must.
You are perfectly fine with 50%!
 
ismann

ismann

Well-Known Member
Dude in Florida asking how to INCREASE humidity lol... I wish I had that problem when I was there. I'm from Tampa and I was struggling in flower to keep humidity below 65%.

If you have pot raisers, you can fill the saucers with water or mist the bottom of the tent with RO water. Or hang a few wet wash cloths at the bottom of the tent. I think 50% is fine though.
 
Just Be

Just Be

Well-Known Member
I take a fish bowl that looks like the one below and fill it with water about three inches from the top. I then take a clean sock, soak it in the water and then stretch the collar of the sock around the rim of the fishbowl leaving the rest of the sock in the water. I then place a PC fan on top drawing the
air outward.
.1.jpg
 
Kingrow1

Kingrow1

Well-Known Member
Still waiting for Renfro or some boveda newbie to answer the question above on air flow mitigating humidity - guessing your all too busy being super clever :-)
 
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