Thx for explaining thatWHAT? No no no. The reason you don't run co2 during the last 2 weeks is because of the Ethylene the plant produces to ripen your flowers. Ethylene is a hydrocarbon gas that plants produce at the end of there life cycle to ripen. If you run high levels of co2 while the plant produces Ethylene c2H4 it effects the hydrocarbon compounds. Ethylene has 2 carbon atoms and 4 hydrogen atoms which work together to ripen. This process is undergoing 4 types of reactions - oxidation, polymerization, halogenation, and hydration which is how you buds get that ripen look and oils.
You never want to affect the Ethylene ripening process, literally 2 gases in high concentrations effect each other. Co2 goes up, Ethylene stays down, Ethylene goes up, Co2 goes down, never ever up at the same time. No different than you guys putting a boveda 62% humidity pack in the jar during the sweating process, u never ever do that. You burp the jar until the jar consistently stays at 56-60% then after its stable a few days later u add the boveda pack so it's not affecting the sweating process. If you run extra co2 while the plant is producing Ethylene c2h4 your plant will literally not ripen correctly and you will have decreased quality, decreased oils, terpenes and everything. Don't do it.
I hope this helps.
~ Sr. Quality Engineer, M.S, (Medical)
When to Stop co2 Increase During Flowering?
- Thread starter Micobfsb
- Start date
Thx for explaining that
calvin.m16
Well-Known Member
When propane undergoes combustion, it reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O) as the primary byproducts. The balanced chemical equation for the complete combustion of propane is: C3H8 + 5O2 -> 3CO2 + 4H2O (Note no Ethylene C2H4)
BRO SCIENCE ALERT
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calvin.m16
Well-Known Member
I've learned VPD plays a big role in this, Early/Mid bloom I run 1.4 VPD with LEDs, 1500 PPM Co2 and 2.0 EC maxibloom. I like to lower my VPD to 1.0 in the last few weeks of bloom (with known cultivars) or another way you could do it is once you see most the pistils turning orange you can drop VPD until ready to harvest. I also flip off my co2 generator in the last couple weeks, I notice that the extra heat it puts off isn't worth it and I believe too much co2 would have more of a profound potentially negative impact on ripening than too much light.
I run the higher temps & humidity vs lower temps & humidity during the summer and change over to cooler temps and lower humidity in the winter, I really do not notice a big difference in the end product doing this. I've tracked it closely with my Pulse Monitor and a AutoPilot co2/environment monitor.
I've tinkered with lowering LEDs and even using the dimming features on controllers, every time I did that my power bill went down over a 30 day span but my yields also went down come harvest using healthy control plants.