How Vapor Pressure Deficit (VPD) Is Effecting my Grow

T

The Nine

Active Member
WeedFreak78 said:
How would one go about mitigating the moisture issue without sophisticated environmental controls? I could see ramping temps down, slowly, if using AC, just before lights of so there isn't as much passive cooling. Conversely, heating the incoming air just after lights off to temper the cool down. I don't have either of these options. I don't see a dehuey making much of a difference in that hr time frame.

I've never seen RH over 55%, but it's something I want to be educated on, just incase.
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This is the issue my friend.
The outside temps and RH are also big factors especially when drawing in fresh air via intake fans.

I've never seen this being an issue until the colas become 'monsters'.
I've seen grow after grow in the same set up produce a1 bud, then In the same set up but with monster colas, bud rot sets in from when they reach a certain size/density.

I don't have the answers right now, but my friends are trying heating the air just on lights out then maintaining a gradual drop of 10 degrees throughout the 12 hour cycle before allowing the air to heat up naturally from the lights on again.

I will keep you all updated as the trials are ongoing.
 
T

The Nine

Active Member
Bdoggg said:
After lights off, adjust your outtake speed to a lower setting and almost cut the intake entirely. No cold air in and the temps would cool down much slower so there'd be less condensation. What i'd do anyway :eyesmoke:
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Thanks.
But the warm air within the room would be very moist and looking to dump the moisture as the air cools due to lights off.

There really are many variables to consider.
:)
 
Bdoggg

Bdoggg

Active Member
The Nine said:
Thanks.
But the warm air within the room would be very moist and looking to dump the moisture as the air cools due to lights off.

There really are many variables to consider.
:)
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Yep the hardest part of growing.. listen to ttystikk he knows whats up. Get yourself a good ol' dehumidifier you'll be good
 
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