Grow Tent Ventilation Setup & Exhaust Guide

Ventilating your grow room is way too important. To such an extent that the worst cannabis problems come from bad ventilation.

CO2 levels, temperature, humidity, and more. Cannabis plants can only thrive in certain climate conditions.

Why Your Grow Tent’s Ventilation Is So Important?

Your grow tent should try to replicate nature’s growing conditions. And the more control you can exert over those conditions the better.

Ventilation and exhaust are the core of it all. It helps ensure that the air in your grow tent is conducive to healthy growth, strong plants and great yields. 

Keep The Perfect CO2 Level For Cannabis 

Like all plants, cannabis needs carbon dioxide to survive. But when plants are in a contained space, the CO2 in the air will quickly be depleted and replaced by oxygen without proper airflow.

This means we need to replenish it in some way. Your setup should have 2-way air circulation, so the cool fresh air filled with CO2 goes in, while the used air goes out.

Control Humidity And Excess Heat

Bud rot because of bad ventilation

Cannabis plants thrive in what we would consider “comfortable” temperatures. That is to say a range between 70-85 °F (or 20-30 °C) during the vegetative stage. When your plants are ready to flower, you’ll find that dropping the temperature to around 65-80°F (18-26°C) results in better yields and quality buds.

As well as controlling your grow tent’s temperature, you also need to consider the humidity. Apart from ambient humidity, plants transpire and release water into the atmosphere. 

Without a proper exhaust you may find yourself with a damp grow space where mold and fungi will start to develop. Believe me, you want nothing to do white powdery mildew or bud rot.

Avoids Pests And Plant Diseases In Your Tent

Mold and fungi aren’t the only life forms against which growers need to be vigilant. You also need to protect your plants from insect pests which can thrive in stagnant air and moist topsoil. 

That’s where grow tent ventilation and exhaust come into play. 

Spider mites and fungus gnats find it difficult to fly in well ventilated spaces. Meaning that your plants are much safer from them when you have the right fan and exhaust setup.

Strengthen Stems

Finally, it’s important to remember that cannabis plants benefit from a gentle breeze, and even needs it for optimal growth. 

This gives the stems a nice workout and prevents them from becoming too weak to support proper bud growth. 

Without a replicated breeze in your grow tent, your stems can become anemic which may lead to bowing. This in turn can prevent the leaves from absorbing enough light to properly photosynthesize, which impedes proper growth.

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