co2 confusion

I spoke with a guy today that said c02 was mainly benifical during veg. I am using co2 during flower. I think I see a noticable increase in flower size. My question is does co2 porlong the flower period. My plants are about to enter week 7 and most of my pistols are white still. In previous grows they were well on thier way to finish at week 7without co2 and were getting flushed. should I discontinue co2 during late flower to facilitate finishing? Anyone with exp with co2? Thax

selmagreen said:

I spoke with a guy today that said c02 was mainly benifical during veg. I am using co2 during flower. I think I see a noticable increase in flower size. My question is does co2 porlong the flower period. My plants are about to enter week 7 and most of my pistols are white still. In previous grows they were well on thier way to finish at week 7without co2 and were getting flushed. should I discontinue co2 during late flower to facilitate finishing? Anyone with exp with co2? Thax

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I have no experience with co2, but I'll say this much. I can use google. Here's what I found.

http://www.sjsu.edu/faculty/watkins/CO2plants.htm

Basically what I got from that is that co2 is beneficial in creating higher yields for crops, especially in low light situations. It's also needed to help the plant drink water better.

I'd have to guess that if you're nearing flowering and are planning on flushing them soon then you'll want to keep pumping them with co2 just so they drink the water and flush themselves out the best they can.

Like I said, I don't know jack about, or have ever used co2. Except in my pellet gun.

co2 from start to finish
its the only way to go

veg and flower both need co2

More CO2 in the air means more plant growth.
Earth's current atmospheric CO2 concentration is almost 390 parts per million (ppm). Adding another 300 ppm of CO2 to the air has been shown by literally thousands of experiments to greatly increase the growth or biomass production of nearly all plants. This growth stimulation occurs because CO2 is one of the two raw materials (the other being water) that are required for photosynthesis. Hence, CO2 is actually the "food" that sustains essentially all plants on the face of the earth, as well as those in the sea. And the more CO2 they "eat" (absorb from the air or water), the bigger and better they grow

Adding more CO2 to the air also benefits plants in other ways:
They generally do not open their leaf stomatal pores as wide as they do at lower CO2 concentrations, and they tend to produce fewer such pores per unit area of leaf surface. Both of these changes tend to reduce plant transpiration or water loss; and the amount of growth they experience per unit of water lost (water-use efficiency) therefore rises, greatly increasing their ability to withstand drought. And with fewer and smaller stomatal openings, plants exposed to elevated levels of atmospheric CO2 are also less susceptible to damage by noxious air pollutants, including ozone and oxides of nitrogen and sulfur, that gain entry into plants via these portals. Higher CO2 concentrations also help plants by reducing the negative effects of a number of other environmental stresses, such as high soil salinity, high air temperature, low air temperature, low light intensity, low levels of soil fertility, oxidative stress, and the stress of herbivory.


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Plants become more resistant to various stresses when grown in an enriched CO2 atmosphere.
CO2 is Earth's greatest airborne fertilizer

Repeat photos of desert environments taken approximately 100 years apart help illustrate the significant growth enhancement we expect the approximately 70 ppm rise in CO2 to have provided over that period. Imagine what an additional 300 ppm CO2 enrichment can do for greening Mother Earth (see photos below).

Thank you all who replied to my co2 confusion. I am going to run it all the way through the cycle. Even if they take 9 weeks to finish.