*Humidity is gonna kill my buds again!

K

kathleenbilly

Well-Known Member
I have dealt with every part of my grow room and have promised i would never again loose to high humidity.

:-( I can't remember the last time i was able to let a crop run to the finish without cropping early because of bud rot!

It's my lights off night time that is the killer here.


I have a square meter tent and 1.8 high,

I have brought a de-humidifier a small one last night i put in the tent it has collected some water but my humidity when i checked my highgometer was up to 87% at some point of the night i don't know whether to laugh or cry...:lol:

Now to be fair i didn't have any extraction fans going or even a fan blowing within the tent just the de-humidifier i wanted to see what that can do and so i have a starting point. I know you must have good extraction at night to lower humidity.

It's just my 6 inch fan is far too loud to run at night.

So tonight i'm going to run a 4 inch fan to run all night extracting air from the tent.

I will also leave the de-humidifier inside the tent again.

My question at this stage please guys at what height should i place the de-humidifier where it pulls air into it, ie: the height of the bud sites?? which then pushes the expelled cleaned air out the top of it.

Or should i set it lower to pull air in from underneath the buds more between the storks and below the canopy??

I will crack this problem i have too! :fire:
 
oregon024

oregon024

Active Member
I have seen grow rms with the big dehumidifier its always been sitting on ground.In a tent woudn't think it matters just get it down and save your grow
 
K

kathleenbilly

Well-Known Member
oregon024 said:
I have seen grow rms with the big dehumidifier its always been sitting on ground.In a tent woudn't think it matters just get it down and save your grow
Click to expand...

The reason i put it inside the tent is because i found outside the tent just the room itself the humidity at night stays around 55% which is fine i have a heater which kicks in at 19 c to maintain that temp at night time.

But inside the tent the humidity sky rockets at night. So thats why i have placed the de-humidifier directly inside.


I will keep going on this would love to leave my 6 inch extraction fan on with de-humidifier and also my intake fan.


Can i ask when you leave an extraction fan on at night, is it also a good idea to leave an intake fan on as well??

Will this help in getting the humidity down??
 
Cali.Grown>408

Cali.Grown>408

Well-Known Member
yea put a de-humidifier in your tent..and make sure its at least a 30pint de-humidifier..those little 2-5pint ones are garbage and wont help much..ive had powdery mildew issues in the past and ever since i got my 30-40 pint de-humidifier i havnt had a problem since
 
K

kathleenbilly

Well-Known Member
Cali.Grown>408 said:
yea put a de-humidifier in your tent..and make sure its at least a 30pint de-humidifier..those little 2-5pint ones are garbage and wont help much..ive had powdery mildew issues in the past and ever since i got my 30-40 pint de-humidifier i havnt had a problem since
Click to expand...

Yes the one i have is the 2-5 pint one probably not doing much at all.

Don't think i could fit in the big 30-40 pint one how big are they? do you have a link to one?

Also leave extraction fan on at night and also leave inline fan on for fresh air coming in plus a small fan within the tent to circulate,

Please tell me this should fix it will try this tonight :lol: may not even need a de-humidifier?
 
Cali.Grown>408

Cali.Grown>408

Well-Known Member
when i have high humidity i turn on my heater..cuz usually if the humidity is up the temp is down..and if that doesnt get it around 45%at night i kick on my de-humidifier..you wont regret it..its worth the money for sure..u can even leave it outside the tent by ur intake, so the air going in the tent is de-humidified..and the size of mine is about 2ft tall and 2ft wide..its big compared to what u have now but not hella big
 
super2200

super2200

Well-Known Member
If your in the veg stage then you have caused most of your problem by NOT exhausting the air that is getting filled with humidity from heat banging on the plants so exhausting the air into the room would raise humidity in the room but it would take a longer time for that same air to get pulled back into the tent passively.I have gas heat and it lowers the humidity big time. I would think it would be easier to control the entire room than control the small tent which you are turning into an oven by not exhausting the air. How would humidity have time to rise if the air is never left in the tent to begin with? heat from the lamp is creating humidity from the plants moisture which is good but not if you are getting bud rot, gas heat would kill all of that or wood stove, dehumidifier's suck and normally cannot keep up with the amount that needs to get removed and you have to empty the dam container that holds the moisture (which you have in the tent getting hot thus putting the same moisture right back into the air) I cant imagine its working at all in a sealed tent its kind of like a sealed jar and don't we burp them to keep the moisture levels from locking too moist. Also your probably growing in a basement possibly and maybe another area in the house upstairs somewhere if this is the case. I would move the de humidifier out of the tent into the room and get some ventilation in there so the humidity is outside the tent and air from the room is pulled in, if you house is full of houseplants this is going to add to the humidity as well and fish tanks will do the same. I think no air circulation is making this a losing battle for you, also are you blowing a fan on the buds? kind of hard to build up humidity with a fan blowing
 
Cali.Grown>408

Cali.Grown>408

Well-Known Member
my temp at night never goes below 62*F and during the day it gets hot cuz i got a 1000w so its around 85*F..my humidity before i got that 30pint de-humidifier was 55-70 when lights were off but now that i got that i can keep it at 35-40 all night long
 
super2200

super2200

Well-Known Member
Make sure the room your growing in is not filled with fish tanks or other things like decorative fountains that have water free flowing as these will throw moisture into the air. Gas heat makes it so simple but we don't all have this, old school wood stoves are great too for taking the moisture from the air. It will get harder to deal with as you have to use air conditioning
 
K

kathleenbilly

Well-Known Member
super2200 said:
If your in the veg stage then you have caused most of your problem by NOT exhausting the air that is getting filled with humidity from heat banging on the plants so exhausting the air into the room would raise humidity in the room but it would take a longer time for that same air to get pulled back into the tent passively.I have gas heat and it lowers the humidity big time. I would think it would be easier to control the entire room than control the small tent which you are turning into an oven by not exhausting the air. How would humidity have time to rise if the air is never left in the tent to begin with? heat from the lamp is creating humidity from the plants moisture which is good but not if you are getting bud rot, gas heat would kill all of that or wood stove, dehumidifier's suck and normally cannot keep up with the amount that needs to get removed and you have to empty the dam container that holds the moisture (which you have in the tent getting hot thus putting the same moisture right back into the air) I cant imagine its working at all in a sealed tent its kind of like a sealed jar and don't we burp them to keep the moisture levels from locking too moist. Also your probably growing in a basement possibly and maybe another area in the house upstairs somewhere if this is the case. I would move the de humidifier out of the tent into the room and get some ventilation in there so the humidity is outside the tent and air from the room is pulled in, if you house is full of houseplants this is going to add to the humidity as well and fish tanks will do the same. I think no air circulation is making this a losing battle for you, also are you blowing a fan on the buds? kind of hard to build up humidity with a fan blowing
Click to expand...

Thanks a good read and some good points i will work on tonight,

As i said earlier my humidity within the room itself is fairly respectable at 55% at night night not too bad for a start.

I fullt understand what you are saying so tonight i will try to following,

Place my de-humidifier outside the tent just within the room it-self.

Basically i need to leave all fans running,

Extraction to pull air out the room completely at night time,

Inline fan to bring hopefully cooler air into the tent ( and my de-humidifier close by working within the room.

A fan within the tent blowing across the buds.

Can i ask is my nights temps of 20 c ok ?

Or should l let this drop down which i can do what do you think?
 
K

kathleenbilly

Well-Known Member
super2200 said:
Make sure the room your growing in is not filled with fish tanks or other things like decorative fountains that have water free flowing as these will throw moisture into the air. Gas heat makes it so simple but we don't all have this, old school wood stoves are great too for taking the moisture from the air. It will get harder to deal with as you have to use air conditioning
Click to expand...

The heater i have is a blow fan heater :-(

I don't mind spening the money so long as i fix this problem it ruining all my hard work! i am finished with getting bud rot!!!!
 
K

kathleenbilly

Well-Known Member
Cali.Grown>408 said:
when i have high humidity i turn on my heater..cuz usually if the humidity is up the temp is down..and if that doesnt get it around 45%at night i kick on my de-humidifier..you wont regret it..its worth the money for sure..u can even leave it outside the tent by ur intake, so the air going in the tent is de-humidified..and the size of mine is about 2ft tall and 2ft wide..its big compared to what u have now but not hella big
Click to expand...

I'm going to try the option i have listed above first,

I'm just a little bit hesitant to get one as my humidity in the room itself at night time is ok, so this leads me to think it's more my extraction system which i'm going to run tonight so i will get my answer by the mroning.

If it don't work then a bigger de-humidifier i will buy as you have said above and give that a go.
 
super2200

super2200

Well-Known Member
kathleenbilly said:
Thanks a good read and some good points i will work on tonight,

As i said earlier my humidity within the room itself is fairly respectable at 55% at night night not too bad for a start.

I fullt understand what you are saying so tonight i will try to following,

Place my de-humidifier outside the tent just within the room it-self.

Basically i need to leave all fans running,

Extraction to pull air out the room completely at night time,

Inline fan to bring hopefully cooler air into the tent ( and my de-humidifier close by working within the room.

A fan within the tent blowing across the buds.

Can i ask is my nights temps of 20 c ok ?

Or should l let this drop down which i can do what do you think?
Click to expand...
I think that's fine temp but the air being trapped is issue so I think if you make the changes you should see improvement and easier to do without buying more equipment. That heated fan should help too as it dries the air big time. Good luck and keep us posted, I hate to see you get so far and have to deal with the nightmares at the end.
 
Cali.Grown>408

Cali.Grown>408

Well-Known Member
kathleenbilly said:
I'm going to try the option i have listed above first,

I'm just a little bit hesitant to get one as my humidity in the room itself at night time is ok, so this leads me to think it's more my extraction system which i'm going to run tonight so i will get my answer by the mroning.

If it don't work then a bigger de-humidifier i will buy as you have said above and give that a go.
Click to expand...
well good luck bro..i know how u feel, high humidity during flowering isnt a pretty site..i've ruined a few plants with Powdery mildew..get that de-humidifier tho..ya wont regret it
 
K

kathleenbilly

Well-Known Member
Thanks guys,

Tonight i'm running all fans,

Extraction Fan pulling the air of the tent and room.

Inline fan pulling fresh air into the tent.

Small fan inside tent blowing over the tops of buds.

De-humidifier left on in room all night just for good measure.

It's going to be noisy but at least i will have my answer in the morning.

I hope next door don't mind the noise for one night...'' :sleep:

If it works then i will get a silencer with an acoustic fan so i can leave on 24 hours without the worry...''

Will post back in the morning :blsmoke:
 
K

kathleenbilly

Well-Known Member
kathleenbilly said:
Thanks guys,

Tonight i'm running all fans,

Extraction Fan pulling the air of the tent and room.

Inline fan pulling fresh air into the tent.

Small fan inside tent blowing over the tops of buds.

De-humidifier left on in room all night just for good measure.

It's going to be noisy but at least i will have my answer in the morning.

I hope next door don't mind the noise for one night...'' :sleep:

If it works then i will get a silencer with an acoustic fan so i can leave on 24 hours without the worry...''

Will post back in the morning :blsmoke:
Click to expand...

Results are in as follows,

Humidity lights on running 24%

Humidity lights off running 43%

That will do just fine i may just be-able to finish a crop without bud rot for once!!!!
 
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