15 solo cups and no-veg

[SpectrumFarms]

Also 45-50 rh @ 80f, vpd is "whacky"

Where should it be? The chart confuses me seems like I’m within parameters for where I’m at in flower?

 

[Observer]

Where should it be? The chart confuses me seems like I’m within parameters for where I’m at in flower?

For late flower?

Decrease temp a few

Mid flower, 55-60rh

 

[Observer]

I just checked my vpd today.

79°f and 50% rh, puts me at like 1.5 in late flower.

First time ever vpd has been pretty on point through the grow and what a difference in plant health.

 

[SpectrumFarms]

For late flower?

Decrease temp a few

Mid flower, 55-60rh

The temps are lower now I have the light where it needs to be. 76-77 are the highs now. That puts me at 1.49

 

[SpectrumFarms]

I’m honestly more excited to try the HB more than anything in the tent this run. Sugar for days! @Bandit420



Atlas Fog Dog

 

[steamroller]

When figuring VPD do you have a way to measure the actual leaf temp.
My VPD chart is 4 pages.
Each is different according to leaf surface temperature difference to room temperature.
Without leaf temp

Vapor Pressure Deficit VPD Calculator - Dimlux Lighting - The Best Grow Lights

Vapor Pressure DeficitCalculator Calculate both Room VPD and Leaf VPD automatically Just enter the value below to generate the VPD values for your room and your plants. You’ll need to know the room’s temperature, relative humidity, and the plant’s temperature. We recommend calibrating your...

www.dimluxlighting.com

 

[SpectrumFarms]

When figuring VPD do you have a way to measure the actual leaf temp.
My VPD chart is 4 pages.
Each is different according to leaf surface temperature difference to room temperature.
Without leaf temp

Vapor Pressure Deficit VPD Calculator - Dimlux Lighting - The Best Grow Lights

Vapor Pressure DeficitCalculator Calculate both Room VPD and Leaf VPD automatically Just enter the value below to generate the VPD values for your room and your plants. You’ll need to know the room’s temperature, relative humidity, and the plant’s temperature. We recommend calibrating your...

www.dimluxlighting.com

I used my laser thermometer I use for mycology for the leaf temperature , didn’t even cross my mind.

 

[Max]

Yup..an ir gun buddy..held around 12 inches above them. You just take readings from different areas and work out an average .doesn’t have to b exact.

 

[Observer]

When figuring VPD do you have a way to measure the actual leaf temp.
My VPD chart is 4 pages.
Each is different according to leaf surface temperature difference to room temperature.
Without leaf temp

Vapor Pressure Deficit VPD Calculator - Dimlux Lighting - The Best Grow Lights

Vapor Pressure DeficitCalculator Calculate both Room VPD and Leaf VPD automatically Just enter the value below to generate the VPD values for your room and your plants. You’ll need to know the room’s temperature, relative humidity, and the plant’s temperature. We recommend calibrating your...

www.dimluxlighting.com

That's why I like the aroya calculator it includes a leaf surface temp variable for more accurate vpd calculations.

 

[Observer]

Yup..an ir gun buddy..held around 12 inches above them. You just take readings from different areas and work out an average .doesn’t have to b exact.

They are handy, only 15$ at Walmart for a cheap basic one.