Humidity  

  RSS
danizeap
(@danizeap)
Eucalipto
250 Likes
100 Likes
Forum Regular
Points: 1115

Hello! 

Now that we are in flowering im worried about humidity. 

Since our new lights are much more powerful humidity has risen, we have 4 de humidifiers and it is still high enough to rot my buds. 

I was thinking about oxygen level and airflow, but im not quite sure about the science. 

Right now I have one about 25cm hole where air comes in and a powerful 40 cm fan that takes out the air inside the grow room.

Does more oxygen inside the room, making another hole or several, mean less humidity? 

Im thinking about adding another fan pointed directly at the plants, but if I dont increase the amount of oxygen inside the room It doesnt make much sense to me to add another fan to move the same amount of oxygen I have now.

Please comment what you think! 

Thanks.

ReplyQuote
Posted : October 26, 2020 1:56 am
Mossbeardmitch, Doctor X, RedEyeJedi and 5 people liked
jacks_farm
(@jacks_farm)
Caryophyllene
100 Likes
250 Likes
500 Likes
1K Likes
Forum Regular
Points: 3679

@danizeap

ok that's go into detail about humidty 

you need to know your dew point where the humidty hits 100% (local weather will tell you online) mine is  6c  today 

and my outside temputer is 7c so my outside humidty is 93%

my room temps 18c so my humidty drops to 45%

so as the temputer goes up the humidty drops fast and other things will affect the increase humidty like a large thick canopy because the leaves release loads of moisture into the air 

also water in the tray under the pots will evaporate into the air 

a strong vacuum (say a 8"fan/filter and 5" air intake fan in a well seal room will reduce the humidty loads)

hope this gives you a better understanding of humidty and how to control it 

 

ReplyQuote
Posted : October 26, 2020 8:55 am
Mossbeardmitch, Doctor X, RedEyeJedi and 3 people liked
danizeap
(@danizeap)
Eucalipto
250 Likes
100 Likes
Forum Regular
Points: 1115

@jacks_farm

Thank you so much! Yes my canopy is very thick so its a problem. 

We do have a well sealed room but no intake fan just the hole that I mentioned and an outtake fan , so I will try to raise the temperature since what I understand warmer air requires more moisture to become saturated. I'll see if that helps, if not I will try and incorporate an intake fan.

Thank you again! 

ReplyQuote
Posted : October 26, 2020 4:35 pm
Macky, Mossbeardmitch, Doctor X and 3 people liked
jacks_farm
(@jacks_farm)
Caryophyllene
100 Likes
250 Likes
500 Likes
1K Likes
Forum Regular
Points: 3679

@danizeap

your welcome fellow, 

if you don't have an intake fan and just extract air out of the room, the humidty will drop more because your causing a higher vacuum, don't really want the temp too high as this can effect the thc 

budrot(high humidty) is more of a problem in the last weeks of flower.

Into late flower it's a good idea to thin the canopy out, you want fan leaves but only a few on each shoot 

It also attracts bugs and the plants start to come to the end of its live at this point(no new growth or buds ), the buds start to ripen and fill out over the last few weeks 

ReplyQuote
Posted : October 26, 2020 4:52 pm
Macky, Hart, Mossbeardmitch and 3 people liked
danizeap
(@danizeap)
Eucalipto
250 Likes
100 Likes
Forum Regular
Points: 1115

@jacks_farm

I do have an extractor its a 40cm fan that works very well but still having problems with humidity, If I create more of a vacuum would that affect co2 levels? Im also worried about co2.

I will try to increase the temp since its in the low percentile right now and at night it drops a bit dangerously, even with the lights on. I have a good amount of room to increase the temp and it be still in ideal levels so I'll give that a try. 

A few days ago we did some trimming specially at the bottom of the ladies, like this:

Screen Shot 2020 10 26 at 12.44.50

 thats how they are looking now, was it too much? could we maybe do more? before doing the definitive one you speak of late into flower.

thank you so much man!  

ReplyQuote
Posted : October 26, 2020 5:47 pm
Macky, Hart, Mossbeardmitch and 3 people liked
jacks_farm
(@jacks_farm)
Caryophyllene
100 Likes
250 Likes
500 Likes
1K Likes
Forum Regular
Points: 3679

@danizeap

I would not trim any more leaves 

Turn extraction fan down low and get a heater and get the temps as high as you can (max about 32c) 

This will drop the humidty, I have never giving C02 any thought

you never need to give the plants more c02, it's mainly used for large sealed rooms

ReplyQuote
Posted : October 26, 2020 5:58 pm
danizeap, Macky, Hart and 4 people liked

In our cannabis growers forum, we have guides to growing cannabis, cannabis grow dairies that cover growing weed in hydroponics, soil and coco. Find the help you need, by either, using the search box, or asking for help in the forum.

 

Our cannabis growers website also has competitions where you can win free weed seeds. As a member you will also have discount codes for cannabis seeds, and LED grow Lighting.
Our Cannabis Growers Forum is for educational purposes and we encourage our members to check their country of residence legislation before germinating a marijuana seed.

 

This site is here because we want to help you grow your own cannabis for personal use. Therefore, any member who is suspected of growing cannabis for commercial gains will be banned immediately.

 

Please read our forum rules, and enjoy the site.

 

Percys Grow Room Facebook Page, Cannabis grower forum fb page,
Percys Grow Room Twitter,
Percys Grow Room Instagram

 

Find us on all social networks! Just search for Percys Grow Room