Humidity too high for flowering

Raspberry420

New Member
Im flowering in a 4x4 tent with a 1000w hps. I have 3 fans, one in each corner, running 24/7. 4th corner has an oscillating fan running 15mins on, 1hr off. Cool tube with exhaust max-fan. The temp ranges from 73-79. But the humidity is around 45-50%. How can I effectively lower the humidity without comprimising temperature? I have done my research and haven't found a thread that has directly answered this question, but please correct me if Im wrong. Btw this is my first grow. Thanks in advance!
 

jcmjrt

Well-Known Member
45 - 50% is a great humidity for flowering. You want higher for veg - about 60% is good.

You can lower humidity with a dehumidifier. I don't know your setup but you could dehumidify the intake air and make sure exhaust air went into a different area - but really 45-50% is fine.
 

Raspberry420

New Member
45 - 50% is a great humidity for flowering. You want higher for veg - about 60% is good.

You can lower humidity with a dehumidifier. I don't know your setup but you could dehumidify the intake air and make sure exhaust air went into a different area - but really 45-50% is fine.

I thought it was best to keep humidity around 35-40%?
Also on a side note: my temps are about 68 degrees F at night, 75-79 degrees F during the day.
I have the cool tube exhausting out of the tent and into the attic.
Already have an a/c in the room the tent is in, which keeps the room at about 78 degree F on average. Temps are pretty stable (besides the night & day difference).
My only concern was the high humidity. It sometimes can get to 61% humidity inside the tent.
Today marks the 5th day of flowering 6 of my beautiful girls. :bigjoint:

Correction: my humidity ranges from 46-61%
 

333maxwell

Active Member
I wouldn't stress it when it climbs.. Growing on the coast where we run 75-80 more than not.. and it can go much higher.. Just kick up the ventilation towards the end and inspect daily for any rot (not that you will, just always check in high humidity) the last few weeks.
 

Raspberry420

New Member
I wouldn't stress it when it climbs.. Growing on the coast where we run 75-80 more than not.. and it can go much higher.. Just kick up the ventilation towards the end and inspect daily for any rot (not that you will, just always check in high humidity) the last few weeks.
So you wouldn't think up to 61% would be bad for up to 12 hours? First thing in the morning I open the doors to check everything, and the stats I first see are 50-51% humidity and 75-79 degree F. But my humidity meter shows the highest it last went up to, which read 61% high, 46% low. I hope that makes sense...I'm blazed as fuck right now. Straight keef.

No need for a dehumidifier? If I don't need one, then I won't waste the money.:eyesmoke:
 

333maxwell

Active Member
All I can tell you is for decades I have grown in coastal area where it is not uncommon for there to be weeks of 100% humidity (quite literally).. Life goes on.. I've NEVER paid humidity any mind EXCEPT at dry and cure, and of course the last few weeks of any harvest, even low humidity desert grows, I check for rot continually daily. Better safe than sorry.. those who don't just never saw what it can do to a plant in 2-3 days left untended.
 

iamaaror

Well-Known Member
Air movement inside the tent than humidity levels when it comes to mold. You seem to have enough with 4 fans going, plus plants grow a lot better at higher humidity levels, even in flowering.
 

Raspberry420

New Member
I definitely have air movement, with the doors shut it's a little puffed (the tent). I just don't like seeing 61% humidity as my high...wanting it to be more around 45-50% for the high (at night).
 
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