cannafarmer420

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#1

I will mess with vpd when everything else is perfect and then still prioritize the temp/humidity measurements over the VPD

 

Smokey0418

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#2

I just use this chart.

Enjoy

 

LoveGrowingIt

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#3

My controllers calculate VPD. I look at it about as much as I look at temp and humidity.

I let VPD rise throughout a grow. The plants like a higher VPD as they get older.

 

2Water

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#4

I've been running:

Seedling:
VPD: 0.4-0.8kpa
Veg:
VPD: 0.8-1.1kpa
Flower:
VPD: 1.0-1.5kpa

Adjusting within those ranges depending on how the plants are responding

 

cannafarmer420

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#5

I like the answers, mine is always high. I haven't had different results dialing it in personally. If it was different it was negligible, I tried a few times. Maybe I'll give it another shot next grow. What are the biggest things you guys notice with dialed in vpd?

 

cannafarmer420

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#6

LoveGrowingIt said:

My controllers calculate VPD. I look at it about as much as I look at temp and humidity.

I let VPD rise throughout a grow. The plants like a higher VPD as they get older.

Click to expand...

Mine does too I have a controller 69 wifi

 

Natep

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#7

Mine typically stays around 1.0-1.5

 

2Water

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#8

cannafarmer420 said:

I like the answers, mine is always high. I haven't had different results dialing it in personally. If it was different it was negligible, I tried a few times. Maybe I'll give it another shot next grow. What are the biggest things you guys notice with dialed in vpd?

Click to expand...

For me, I notice that they just grow faster if I have it dialed in. I'm still new, but having my humidifiers set off vpd has helped me stay ahead of the temp changes with lights on/off.