Veteran
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Today i dialed my room in and am curious about your opinion if i did it right or wrong.
To start i will give some input about my setup.
2x 1000 watt Gavita DE hps
watercooled ac
Co2 tank and controller
topfeed coco
first week bloom
before:
wattage lights 600 watt
room temp 30 c/86 F
Rh 65/70
vpd around 1,5
leaf temp 26,5 c /80 F
Ec 1,3
ph 5,8
After:
wattage lights 750 watt
room tem 30 c / 86 F
Rh 50
vpd around 1,9
leaf temp 25 c / 77 F
ec 1,3
ph 5,8
(The vpd and Rh can fluctuate because the ac turns on and of swinging the Rh level)
If we look at both climates i guess most of you will prefer a vpd of 1,5 rather than 1,9 following a vpd chart.
But dont the plants have more evaporation with a 1,9 vpd causing more co2 uptake because of open stomata?
As long as the leaf temp is cooler than ambient room temp it should be ok right? If you dont agree please explain.
Where is the limit we want to push when we want the highest yields and best quality?
The point im trying to make is that leaf temp is a better guide than a vpd chart, i could be wrong and would like to hear your opinions about this.
To start i will give some input about my setup.
2x 1000 watt Gavita DE hps
watercooled ac
Co2 tank and controller
topfeed coco
first week bloom
before:
wattage lights 600 watt
room temp 30 c/86 F
Rh 65/70
vpd around 1,5
leaf temp 26,5 c /80 F
Ec 1,3
ph 5,8
After:
wattage lights 750 watt
room tem 30 c / 86 F
Rh 50
vpd around 1,9
leaf temp 25 c / 77 F
ec 1,3
ph 5,8
(The vpd and Rh can fluctuate because the ac turns on and of swinging the Rh level)
If we look at both climates i guess most of you will prefer a vpd of 1,5 rather than 1,9 following a vpd chart.
But dont the plants have more evaporation with a 1,9 vpd causing more co2 uptake because of open stomata?
As long as the leaf temp is cooler than ambient room temp it should be ok right? If you dont agree please explain.
Where is the limit we want to push when we want the highest yields and best quality?
The point im trying to make is that leaf temp is a better guide than a vpd chart, i could be wrong and would like to hear your opinions about this.
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