humidity problems

[Winkle toes]

Can anyone help with a bit of advice please. Am currently in flower but humidity's too high when lights are out, just need to know if putting my outlet fan on during night is ok and also will it lower the humidity at all, any advice is greatly appreciated, cheers guys.

 

[furnz]

You should be venting your grow space for air exchange and fan blowing on the plants circulating air24/7 if you don't already. Besides that, a dehumidifier,ac or electric heater will lower RH. Also removing water from any runoff catch trays.

 

[NanoGadget]

Rule #1 for growing indoors is controlling your environment to the best of your ability. That goes for temperature, relative humidity, proper exchange of air in and out your grow space and movement of air over your plants to prevent moisture build up and to strengthen the plant. I have made many mistakes as a grower and 90% of them have been related to not keeping these factors in check. When talking to novice growers the first thing I recommend is getting everything set up to grow and then just run the space empty for a few days (or weeks if you can) so you can see what your baselines are with all the equipment running. This will give a better idea of what it will take to keep your space within optimal parameters. I've been growing for years but recently tried hydroponics for the first time and I spent months talking to people who are good at it and trying to dial my new setup in before a plant got anywhere near it. I still made some mistakes, but I was much better prepared to deal with them because I knew what to expect out of my space in terms of temp and humidity management. Allowed me to focus on getting to know a style of growing that was new to me without battling unrelated factors.

 

[Winkle toes]

T

You should be venting your grow space for air exchange and fan blowing on the plants circulating air24/7 if you don't already. Besides that, a dehumidifier,ac or electric heater will lower RH. Also removing water from any runoff catch trays.

Thanks for your advice and its greatly appreciated. Thankyou.

 

[Winkle toes]

Rule #1 for growing indoors is controlling your environment to the best of your ability. That goes for temperature, relative humidity, proper exchange of air in and out your grow space and movement of air over your plants to prevent moisture build up and to strengthen the plant. I have made many mistakes as a grower and 90% of them have been related to not keeping these factors in check. When talking to novice growers the first thing I recommend is getting everything set up to grow and then just run the space empty for a few days (or weeks if you can) so you can see what your baselines are with all the equipment running. This will give a better idea of what it will take to keep your space within optimal parameters. I've been growing for years but recently tried hydroponics for the first time and I spent months talking to people who are good at it and trying to dial my new setup in before a plant got anywhere near it. I still made some mistakes, but I was much better prepared to deal with them because I knew what to expect out of my space in terms of temp and humidity management. Allowed me to focus on getting to know a style of growing that was new to me without battling unrelated factors.

Thanks for your advice, really is appreciated. Let me jst give you a brief explanation of my set up. All iv got is enough space for is 4 females, my temp is regulated with regular air exchange in and out, iv got a fan blowing on my girls and humidity is ok when lights are on. My problem is humidity when lights are out. My inlet fan and outlet fan goes off when the light goes out and don't come back on untill light comes back on.
What I was wanting to know is would the humidity come down if I put my outlet fan on through the night and also would it do any harm to the plants. Any advice is really appreciated. Thank you mate.

 

[TacoMac]

Put your fans on a different circuit. You should never, ever, ever turn your fans off. Ever. They should run non-stop.

What's happening is that when the fans turn off, the circulation stops. When that happens the water that evaporates from the plants and soil has no place to go, so the humidity skyrockets.

Run the fans at all times.

 

[Jypsy Dog]

When talking to novice growers the first thing I recommend is getting everything set up to grow and then just run the space empty for a few days (or weeks if you can) so you can see what your baselines are with all the equipment running. This will give a better idea of what it will take to keep your space within optimal parameters

Untill you put plants in the mix, then everything changes and you have to re adapt. That's like running an empty aquarium to see what fish are like.

 

[Winkle toes]

Put your fans on a different circuit. You should never, ever, ever turn your fans off. Ever. They should run non-stop.

What's happening is that when the fans turn off, the circulation stops. When that happens the water that evaporates from the plants and soil has no place to go, so the humidity skyrockets.

Run the fans at all times.

Put your fans on a different circuit. You should never, ever, ever turn your fans off. Ever. They should run non-stop.

What's happening is that when the fans turn off, the circulation stops. When that happens the water that evaporates from the plants and soil has no place to go, so the humidity skyrockets.

Run the fans at all times.

Thanks for your advice bud, you learn a lot from info. Just to clarify, I keep my oscilating fan on 24/7. So your advice is to also leave my inlet fan and outlet fan on 24/7 as well ? And also would that keep the humidity down during darkness ? Thanks for helping tacomac.

 

[NanoGadget]

Untill you put plants in the mix, then everything changes and you have to re adapt. That's like running an empty aquarium to see what fish are like.

I said baseline. Obviously transpiration is going effect things, as is the mass the plants occupy, as well as the shade created etc etc... I'm talking baseline. I can't count the number of times I've seen somebody throw a plant in an untested set up and then want to know why it's 100 degrees and 7% humidity in their space.

 

[TacoMac]

So your advice is to also leave my inlet fan and outlet fan on 24/7 as well ? And also would that keep the humidity down during darkness ?

Yes.

The oscillator isn't doing shit but moving around the same air.

Think of it this way: How long would you last if you put your head in a plastic bag? Not long. The same air goes south and you suffocate.

Plants are absolutely the same. Not only does the humidity have nowhere to go, but the oxygen levels constantly increase making it even worse.

 

[Jypsy Dog]

I said baseline. Obviously transpiration is going effect things, as is the mass the plants occupy, as well as the shade created etc etc... I'm talking baseline. I can't count the number of times I've seen somebody throw a plant in an untested set up and then want to know why it's 100 degrees and 7% humidity in their space.

I buy a day or two, several weeks?? Not so much.

 

[Winkle toes]

Yes.

The oscillator isn't doing shit but moving around the same air.

Think of it this way: How long would you last if you put your head in a plastic bag? Not long. The same air goes south and you suffocate.

Plants are absolutely the same. Not only does the humidity have nowhere to go, but the oxygen levels constantly increase making it even worse.

Tacomac your a star mate, thanks for info bud, il be deffo making a few changes now then.

 

[NanoGadget]

I buy a day or two, several weeks?? Not so much.

That's mostly to see how the climate controls handle ambient temp and rH fluctuations. You're correct though, for most people that is overkill. Anytime I make major changes to my space I run it for 2 days and track everything.