What Is Your Vpd....

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Billyboat

Billyboat

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I run 75% at around 80-82 degrees and co2 around 1000 till week 5 and then I start to dial it back to 50% as I've gotten rot on a few of those big colas.

What really helped me was floor fans, lots of fans up top and lots of fans down below. No stale air.
 
planesane

planesane

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I have some questions about the vpd chart.

Air temps matter correct? what happens if temps are 20 C at canopy and a 40 RH? according to the chart I am still in the green zone, but not all charts are this detailed in my opinion. Can i still get similar results with these temps and humidity? will I still get the same growth as a 80 F 70 RH environment?
 
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GT21

GT21

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Lmao.... How did this plant survive without all our stupid fuckin charts... Mind boggling.

I know when my plants sit outside in 0% @ 100f...the first thing i do is go run and grab my vpd chart hahaha
 
indicabush

indicabush

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Lmao.... How did this plant survive without all our stupid fuckin charts... Mind boggling.

I know when my plants sit outside in 0% @ 100f...the first thing i do is go run and grab my vpd chart hahaha

Ha,ha,ha...I have the same chart...somewhere...oh yeah, over the rainbow
 
DGP

DGP

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I didn't see it in the thread anywhere but VPD must mean vapor pressure density?? Dang, this goes against some conventional wisdom on higher levels of humidity I have seen in the past. Are these humidity levels only optimum if your using C02? New stuff to me.....

Thanks,

Dee
 
sixstring

sixstring

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this is not for everyone imo.you dont want to use this in a crowded tent or even a room for that matter with unhealthy plants or you will just have more problems.good air movement,healthy plants and good spacing is a must.
 
H

heisen

2,626
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Never once paid much attention to that chart.only during late flower.to high humidity you'll get bud mold on big colas but as far as growth I've never seen a bit of difference between 40 percent and 80 percent
 
Mr.jiujitsu

Mr.jiujitsu

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5D460F29 F80B 435A 9C8F 4A500DA05352
Never used the chart but looks like I’m doing ok
 
P

PharmHand

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Lmao.... How did this plant survive without all our stupid fuckin charts... Mind boggling.

I know when my plants sit outside in 0% @ 100f...the first thing i do is go run and grab my vpd chart hahaha
Surviving and thriving(achieving maximum output) are two very different things
 
G gnome

G gnome

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I didn't see it in the thread anywhere but VPD must mean vapor pressure density?? Dang, this goes against some conventional wisdom on higher levels of humidity I have seen in the past. Are these humidity levels only optimum if your using C02? New stuff to me.....

Thanks,

Dee
I thought it was vapor pressure deficit...?
 
P

PharmHand

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In this theory plants in florida and hawaii would grow better than the triangle, southern oregon, colorado?
Haha really? Take a look at a postcard from those 5 places which ones appear to have more plant life? Since what you’re saying flys in the face of highly studied well established/accepted horticultural science I feel the burden of proof is on you..... So billyboat ( therealiog) and jackmayoffer( jungleboys) and all those charts created by horticulturists studying plant growth, they’re all wrong in saying that plant growth is accelerated when a minimal deficit is applied? And you’re right because your plants don’t “die” outside in the desert?
 
GT21

GT21

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Haha really? Take a look at a postcard from those 5 places which ones appear to have more plant life? Since what you’re saying flys in the face of highly studied well established/accepted horticultural science I feel the burden of proof is on you..... So billyboat ( therealiog) and jackmayoffer( jungleboys) and all those charts created by horticulturists studying plant growth, they’re all wrong in saying that plant growth is accelerated when a minimal deficit is applied? And you’re right because your plants don’t “die” outside in the desert?
Name drops!!!!

Can they at least make a chart that goes to 100? You know for us low class folks with dying plants.

Are plants allowed to grow at 100... I dont see it on the chart.
 
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