How does adding CO2 to a Grow Tent Benefit Clones

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More and more farmers are boosting plant growth and getting larger yields by adding CO2 for their plants. Under the same conditions, the yield of the spaces with added CO2 is consistently higher than that of spaces without extra CO2—how great this improvement is varies by set up and experience. So can adding CO2 have the same effect when we clone plants? The answer is yes. Although we have fewer plants when cloned, they still benefit from the addition of CO2.

Benefits of adding CO2

Faster rooting

FAST rooting-adding CO2 to a Grow Tent Benefit Clones

We know that cloning is the re-growing of shoots cut from a parent plant. An important indicator of successful cloning is rooting, which means that the cloned plant is becoming a complete plant. Adding CO2 to cloned plants will encourage them to root faster.

But it should be noted that CO2 is not added to the roots of the plant, but to the leaves of the plant because you add CO2 by “injecting” it into the air. Providing the leaves with CO2 speeds up photosynthesis and produces sugars in the process, an important source of energy for rooting. That said, adding CO2 can encourage the production of sugar, which in turn allows for faster root growth and thus faster access to the vegetative stage.

Reduce water loss

Cloned plants need to be in a high humidity environment because the cuttings have no roots and can only store moisture in leaves. If they are in a standard cannabis environment the moisture in the leaves will evaporate quickly, which will cause the branches to wither or even die from lack of water.

Plants absorb CO2, as part of the process of photosynthesis, by opening their stomata. At the same time the pores are open, water will evaporate. Some experiments have proved that adding air enriched with CO2 to your plant’s environment will encourage your plants to open their stomata smaller, which can effectively reduce the transpiration of water. This is undeniably very useful for cloning.

Avoiding pathogens

Like we said above, cloned plants need to be in a high humidity environment. High humidity environments tend to breed various bacteria, molds, etc. This is of course very detrimental to the growth of cloned plants. Adding CO2 to them can effectively prevent the infestation of plants by various pathogens.

Indeed many products for the prevention or treatment of fungal diseases work by changing the pH of the plant so that certain pathogens cannot attach to the plant. In this regard, CO2 can provide the same effect. CO2 is a naturally anti-pathogenic because when you add CO2 to the leaves, it also changes the pH of the leaves. Compared with those bactericidal products, CO2 has more preventive effect.

So how do you add CO2 to your clone?

HANG CO2-adding CO2 to a Grow Tent Benefit Clones

We have several ways to add CO2 to plants: CO2 burners, compressed CO2 tanks, or suspend-able bags, all of which can be used in cloning. But we need to pay attention to a few things.

  1. Avoid high concentrations of CO2. For cloning, it is best to maintain CO2 concentration levels at 1000-1300 Parts Per Million (PPM). Too high of CO2 concentration means too low oxygen concentration—oxygen is also very important for plants, especially for root growth. You’d better use a CO2 controller to monitor the concentration of CO2 in the air to avoid this.
  2. Be sure to pay attention to air circulation. If you don’t have CO2 for your clone then your ventilation won’t have much effect even in general. But in the case of high CO2 concentration, you must ensure that you have very good ventilation, otherwise your cuttings will turn yellow and soft, or even die.
  3. If you are very interested in adding CO2 during the cloning period, you can try to choose a CO2 pad. CO2 mats are made with natural chemicals. It automatically releases CO2 when exposed to humidity. This mat is made for cloning and propagation trays.

Wrap-up

Not many people add CO2 during cloning compared to adding CO2 in a normal grow room. But that doesn’t mean it’s useless. Throughout our long growing careers, there is always something new to try to make our growing more interesting. For more planting knowledge, please subscribe to our newsletter!

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