The Benefits of Adding Carbon Dioxide (Co2) To Your Grow

By Devin Martinez |

There are two main benefits to using Co2 in your indoor garden that I found: greater yield and faster growing. To explain further, plants have a certain amount of moisture and energy in their leaves at all times, and Co2 aids in bringing out that energy to help your plants thrive. By unlocking that stored energy, most growers agree that you will get about 20-30% more yield with an increased growing speed of at least 15%.

When a grow is able to utilize Co2, the increase of moisture in the plant gives it more resiliency. Plants can usually only survive in 70 degree temperatures, so with Co2 plants won’t dry out as easily when maintained. That means your plants will be able to take a little more heat than it usually would and your plants will be better for it.

There are 3 main ways to introduce Co2 in to your grow: a regulated tank of Co2 (regulated by a device such as our Co2 Regulator), natural source of Co2, found in products like our EZ-Co2 Bag, or propane/natural gas burners. Keep in mind that burners are really hot and can turn a grow room into a furnace if temperatures are not regulated.

CO2, when done right, will increase the speed and yield of your grow. With that speed you’ll have more harvests per year, and in turn, you’ll have bigger and better yields without having to go through a dry period.

What do I need to know before adding Co2 to my grow?

Co2 will increase the humidity of your grow, which in turn creates more moisture. More moisture you have in your grow means the potential for fungus and rot in your garden increases. Moreover, if you let your Co2 go unregulated it can create a toxic environment for your plants and yourself. A Co2 level of over 2000ppm can kill your plants, and levels higher than that can become unsafe for humans and animals to breathe.

To avoid these issues you’ll need to control ppm levels by venting your grow. Most use meters to measure the levels of Co2, like the LTL Co2 Air Controller we offer. For venting, you’ll need fans and ducting. Some use duct fans that connects to aluminum ducting and escapes through exhaust ports on your tent. Others use in-line fans that connect directly in to the ducting and carry that out of your garden via exhaust ports in your garden.

Now, Co2 is heavier than oxygen so it usually falls down allot easier than oxygen. But when venting your grow, there is a potential for the abundant natural oxygen in your growing area to overpower the Co2 and render it useless. On the flip side, if there is too much Co2 in your grow the humidity levels will get too high and prevent the plants from growing.

Because you’re giving your plants more Co2 to increase the speed for your grow, you will need to keep a close eye on your garden as you will need to compensate the extra Co2 with more water, nutrients, and light. This increase of energy will mean higher temperatures in your grow. Venting should be done in a closed area and done only when your lights are off to
lower the temperature of your grow.

For example, when using HID bulbs (like HPS and MH bulbs in your grow light system), you’ll want to vent your area to cool your grow because HID’s emit so much energy and heat. When using LED’s, on the other hand, you won’t have to worry so much about heat, but you will always want to vent your growing area to regulate the ppm level.

Overall, Co2 will get you bigger, better yield and more yields per year. Keep in mind that Co2 can be a little tricky to add to your grow. You’ll want to be sure that your ppm level is at 1000-1500 by venting your system, and at same time, you’ll want to keep up with your water and light levels at all times.

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