Cannabis plants require CO2 for the grow room as part of the process of using photosynthetic activity to produce energy from light. Without CO2 the devices will “suffocate” and expire. That is part of why getting like most fresh air is so essential to your plants.

Enhancing your crops with additional CO2 can improve your yield and development by approximately 20%, but what is the proper way of using CO2 for a cannabis grower? There is also the right way and the wrong way to use CO2, and sadly many people are using CO2 in the wrong way and not having any of the benefits! CO2 is short for “Carbon Dioxide,” an unscented gas which enables us to breathe.

For growers who are using low powered growing lights, the plants seem to have more than enough CO2 in daily clean air to be able to process all the light they are afforded. If your plant doesn’t take in more CO2, including more would not help much, since they still have more CO2 than they can need.

The simplest and fastest way to obtain CO2 to your grow room is through the use of exhaling CO2 bags. The CO2 bag releases carbon dioxide all day, with no need for the use of recycling bottles and the use of expensive amounts of production.

They work by the respiration-the mechanism through which plant leaves create carbohydrates is photosynthesis. The activity of chlorophyll in plant chloroplasts turns sunshine, carbon dioxide, and water into carbohydrates and oxygen. Plants growing indoors often lack enough CO2 to photosynthesize effectively under artificial light. When plants can optimize the photosynthesis process, the result is better planted with increased yields.

So when there is more light available than the cannabis plant will actually access, things are different. Supplying more CO2 in high-light scenarios will allow the plants to use more of the light, which results in improved photosynthesis. By allowing your plants to generate more energy from the same amount of light, you’ll be rewarded with better growth and greater yields!

In this way, the addition of CO2 makes the plants more resistant to heat and light stress as an added feature!

One of its disadvantages is that CO2 can be costly to fix. So it’s a smart idea to work out how many, if any, you should be provided to get faster growth before you start adding CO2.

What is CO2?

What we remove while breathing is CO2 or carbon dioxide, and what plants use to activate photosynthetic functions. In reality, plants ‘breathe in’ CO2 during the day, but release CO2 by night. CO2 levels are measured in PPM or parts per million and usually in the 300-400ppm region, ambient room levels are. If you have enough blood flow in your growing room you must be able to meet the atmospheric standard of 390 PPM. You should be seeing crop production at this similar level to what you’re seeing in your greenhouse.

If the levels of CO2 drop below 200 ppm your plants will stop growing. It is knowing this activity that will support your development in real terms. If all is done properly and you have a carefully designed process, then CO2 can be the one major difference in boosting your yields. Adding increased levels of CO2 to your growth will improve plant growth dramatically without having to shift the way you develop.

If you’re looking to improve your crop growth periods, consider adding extra CO2 for the grow room. Plant growth speeds up as you increase your CO2 levels to about 1,500 PPM. Growers reported an improvement in growth speed of up to 100% at 1,500 PPM.

Benefits of Adding CO2 to your Grow Room

The much more critical and obvious benefit for your plants is the significant growth that will occur, particularly if your setup’s capacity has already been greatly increased.

Besides this, if CO2 levels can be kept around 1000-1200ppm then you can run your grow room at a higher temperature. This can be extremely essential with growers working continually to keep temperatures down to reduce the effect of temperature on the plants.

  • CO2 During Vegetation

Adding CO2 during the phase of vegetative growth, this is the higher chance of having an increase to the rate your plants’ stretch, this can give permission to your plant to grow with a lot more vegetative in a short period of time.

  • CO2 During Flowering

When you are about to add CO2 to your grow room, you must focus on its flowering stage as it is the most important phase of growing your plant. It can give a kickstart flower production and can enhance its flowering size significantly only if you will add CO2 to your grow room.

The Advantage and Disadvantage of  Using CO2


  • Faster Growth and Bigger Yields 

CO2 will make your flowers thrive up to 20% quicker, generate larger plants, and increase your yields if you have maxed out the other limiting factors (particularly light).

  • Higher Temperature

Keeping up the 1200 to 1500 PPM of CO2 throughout the growing region helps farmers to sustain temperatures that are much higher than the regular, up to 30 ° C (95 ° F). This will make it safer for producers with hot bright lights to hold temps at a range that their plants would appreciate.

  • Security

If you secure your growing area so you are not letting out the smelly air, CO2 enrichment can be useful for security. Certain ways of adding CO2, such as using a CO2 generator, can also produce natural odors that can specifically cover up the marijuana scent.


  • So far as the light strength is involved, to generate adequate bright light for your crop to be allowed to use another extra CO2, you certainly need either MH or HPS or heavy LED growth lights. CFLs or T5s are not likely to be bright enough to get fantastic CO2 results.
  • While inserting only a little CO2 does not require a sealed environment, you usually need to seal the uprising area while attempting to sustain very high CO2 levels (such as 1200 to 1500 PPM) so that it is airtight to prevent CO2 from escaping out.
  • If you want to pump a whole bunch of CO2 into your growing field, such as in large growing operations, it can be costly to get started. In fact, the cheapest options to add up CO2 are not very good at offering a lot of CO2 over time, but it can be a perfect way to “dip your feet” and check out CO2. In the long run, the better CO2 setups are a little more expensive to get off with, but once you have your initial supplies, they become the cheaper alternative.
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