KiLoEleMeNt
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me too......iv never understood why its recommended higher temps for co2...... wouldn't you want higher humidity so the stomata is fully open to better absorb the co2? I think co2 in veg is more beneficial than in flower. I too don't agree with a lot of what @KiLoEleMeNt posted...... not that it isn't useful and informative, but temps over 80? humidity under 60? co2 12-1500, high ec, no mention anywhere of vpd.... I ran those parameters for a few years when I first started growing, and I grew shitty weed.
Actually if u go back and read it I said when using c02 Relative humidity control is an essential part of insect and fungal control, as well as plant uptake and growth. Humidity above 80% and to get there u must have higher temps referring back to my RH chart pretty much everything stated is about vpd just never used the term vpd
By looking at the example we can see that at 70% RH the temperate should be between 72-79°F (22-26°C) to maintain healthy VPDs. If your growing environment runs on the warm side during summer, like many indoor growers, a RH of 75% should be maintained for temperatures between 79-84°F (26-29°C.)
The problem with running a high relative humidity when growing indoors it that fungal diseases can become an issue and carbon filters become less effective. It is commonly stated that above 60% RH the absorption efficiency drops and above 85% most carbon filters will stop working altogether. For this reason it is good practice to run your RH between 60-70% with the upper temperature limit depending on your crop's ideal VPD range, in the example it would be 64-79°F (18-26°C.)
The table also shows that if your temperature is above 72°F (22°C), 50% RH becomes critically low and should generally be avoided to minimize plant stress. Please understand that by presenting this information I do not want you to go to your indoor gardens and run your growing environment to within strict VPD values. What's important to take from this is that VPD can help you provide a better indication of how much moisture the air wants to pull from your plants than RH can. If you want to work out for yourself the VPD of your plants leaves there are plenty of charts you can get on here as well as google
As for you running this way and growing shitty weed (this may not be the case) But you may not have been providing them with what they needed to grow correctly as I stated they eat drink and transpire much more and when not givin the nessary amounts the plant Grows terrible and the co2 is wasted
Thankyou for not just calling the info crap Respect +1
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