RH for flower need help

Hey everyone ,

Any ideas on what the ideal RH for flower should be when lights on and lights off? I am using two 1200w led grow lights and today is my first day of flower And this is my first grow. I’m pretty excited and trying to make sure my environment is dialled in. I am growing in Promix HP with micorhize in 7 gallon pots. Any help would be great. Thanks in advanced.
 

xtraLRG420

Well-Known Member
Whether the lights are on or off your RH in early flower should be about 45%. As buds develop you wanna start dialing that back a little just to where you aren't developing any mold.
 

Hot Diggity Sog

Well-Known Member
These humidity levels are for everything...seedlings, veg and flower. That said, my temps never exceed 78 and are typically in the low 70's. I too would never let the RH sit above 70. Good air flow and air exchange are always important (obviously).
 

Nefrella

Well-Known Member

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Dontjudgeme

Well-Known Member
I typically stay at 50% RH through my whole flower. Last 2 weeks I drop it 40%. High humidity really isn’t an issue as long as there’s sufficient air flow and exchange. Stagnant air is where the mold comes from. I’m sure I could get away with higher humidity levels, but I’ve never had an issue staying at 50. If it ain’t broke, don’t wanna fix it.
 

Nefrella

Well-Known Member
I typically stay at 50% RH through my whole flower. Last 2 weeks I drop it 40%. High humidity really isn’t an issue as long as there’s sufficient air flow and exchange. Stagnant air is where the mold comes from. I’m sure I could get away with higher humidity levels, but I’ve never had an issue staying at 50. If it ain’t broke, don’t wanna fix it.
Copy. I have adequate airflow, so guess I'm gonna stop trippin' ☮✌
 

GBAUTO

Well-Known Member
Anyone used this one, or have a suggestion for a good mid priced dehumidifier?

Check this out at Amazon.com
hOmeLabs 1,500 Sq. Ft Energy Star Dehumidifier for Medium to Large Rooms and Basements - Efficiently Removes Unwanted Moisture https://www.amazon.com/dp/B073V9MG3Y/ref=cm_sw_r_other_apa_i_L3cUEbKV5T1DY
How large is the room your grow is in?
I run a Frigidaire 50pt dehuey in my upstairs grow room(450 ft3), and it will completely fill every day(I live in the Smokies).
 

Nefrella

Well-Known Member
How large is the room your grow is in?
I run a Frigidaire 50pt dehuey in my upstairs grow room(450 ft3), and it will completely fill every day(I live in the Smokies).
~300 sq. ft. Room size that the tent is in. RH is around 55% in the flower tent, and I'm exhausting outside 24/7. Do I really need a dehumidifier?
 
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