RockinRobot
Active member
I run 1000ppm CO2 and 1000ppm @.5 scale (2EC) on nutrients.
While the plants are flowering, is there such a thing as too much co2? I’ve been running my 12x12 rooms at 1200-1500 ppm. Am I wasting co2 or even possibly damaging the plants?
you own all that space and your running really high temps with rh way too low. and budrot certainly doesn't happen with higher rh. my room is always in the 70s.. never see bud rot at all. id love to proven wrong though, have you got any pics?the paper shown above is basically correct for the fastest metabolic rate in cannabis.
he shows 1500 umols of light at 86F with a lights on rh of about 60% and lights off rh of about 50% and co2 @750 ppm as an ideal goal for a commercial sealed room.
the only flaw i find in that paper is that he only tested co2 up to 750 ppm.
i'm personally running 84-88f lights on and 78f lights off. about 1200 umols of light flow using daylight leds. co2 set point at 750 ppm but with a 50 ppm dead band the room will go up to about 900 ppm and slowly go down from there. rh 60% lights on and 48-50% lights off.
i'm getting dense flowers and tight nodes.
i realize the vpd tables say that you should run a higher rh at these temps but you will certainly get bud rot if you do.
my cannabinoid and terpinoid profiles come back from the lab showing no degradation of either using these parameters.
i might add that this is in a 10k sq ft room being run for commercial purposes. weight and flower quality matters and is closely monitored.
we are getting outstanding yields.
editing to add that i'm using a 900 ppm at the .5 conversion nutrient input into a ppk system.
you own all that space and your running really high temps with rh way too low. and budrot certainly doesn't happen with higher rh. my room is always in the 70s.. never see bud rot at all. id love to proven wrong though, have you got any pics?
What up yall!
Im running crazy high RH in my flower room ...about 85-90% !!! Did it successfully for two runs with abosolutely ZERO mold on the first run and a couple buds with a tiny bit of aspergillum on the second...It was really few buds from the main cola and i scraped it off with the scissors cause they were really small spots
The last one yielded 1.56 Grams x Watt
I run LED and Co2 and the temps are always on the early 70s.....i noticed that the plants are transpirating a lot despite the high RH, the leaves are very perky and prayng to the light and the methabolism and the rithm of growth hasnt slowd down a bit even if i was watering every 3 day......
Saved a lot of power on dehums...running only AC
Mold problems are definitely related to water condensation in vented rooms IME....