PulsePeet
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What are the effects of CO2 injection at 1200PPM in a flowering plant? What should the target VPD be if different than atmospheric 400PPM levels?
To illustrate this, check this out: http://www.co2science.org/education/reports/greening/thefuture.phpCO2 doesn't really impact ideal VPD, but the ideal temperature to keep your plants. CO2 supplementation raises the ideal temp for photosynthesis, so you need to run your room hotter if you want to take advantage of CO2. With higher temps, you need higher humidity to hit the normal VPD targets. I'll prob write a blog post on CO2 soon!
90's is too high, i don't think you want to go above the high 80s.Sure with Co2and high temperature u can grow monsters and fast but in my experience everytime i tryd to flower in the 90s the quality went down big time!Big buds but....sayonara fat tricomes! I found that low temps are much better for the frostiness and the terpenes...still run 1500ppm of gas..maybe im wastin it?! but plants are still really happy in high humidity!!
Everytime i see studies and articles on co2 with plants none has been done on cannabis flowers!!!
Anyway...that pic on the VPD is really cool!
So my humidity has increased by 15% average since going sealed with co2 at 1800ppm. My leaf temps actually running 75 to 76f now vs no co2 at 76-77f. I put in a window unit inorder to cool the room. Im using a 1000w hid and around 12 inches from the canopy. No leaf burns, one plant has a calcium def it seems. . but shared res so im thinking its something else. . but overall. . i had the same issue with the same strain with no co2. Not really posting to fix that issue, more less wondering what vpd charts would suggest my environment would be. Im hydro at 74-75f water temps. I find the warmer the temps, the faster the metabolism. So now does the vpd charting work when comparing slow and fast growing phenos? Wouldnt a faster growing pheno demand more than a slower one. How does vpd take a plants metabolism into effect? Ive never focused on vpd honestly. Can you convince me why I should plz?
I plan on getting a dehumidifier soon. . but do i need one? I run 40-60 rh before co2. Now since im sealed im 50-70 rh. I was going to drop it down to 50rh with controller. . but thats only because i dont want budrot. I guess im not understanding something. .
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