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Why Temperature & Humidity Matter?
Cockshull, in his work from 1985, revealed that we still don’t fully understand how humidity and temperature impact growth and yields in protected crops, and this knowledge gap is silently undermining greenhouse operations worldwide. In grow tents, the temperature and humidity control are critical because they directly impact plant processes like photosynthesis, respiration, and water uptake, influencing overall growth rate and health. Maintaining an optimal environment prevents stress, reduces the risk of diseases and pests such as fungus and root rot caused by high humidity, and prevents dehydration caused by low humidity, ultimately ensuring plants can thrive and grow strong. By providing the perfect temperature and humidity level for each plant growth stage, including seedling, vegetative, and flowering, this blog helps you create the best possible environment for your grow tent.
Ideal Temperature & Humidity by Growth Stages
In indoor plants, the relative humidity of the grow tent has a great impact on the respiration process. Plants use atmospheric carbon dioxide to transform sugars into energy during photosynthesis. Relative humidity controls how much water the plants lose to the environment because of the carbon dioxide uptake.
Mathew and his colleague in 2014 stated that under moist conditions, the spores of the mould multiply exponentially. Root rot disease from the underside and leaf spot diseases from the top combine in a perfect storm of plant destruction. As you know, plant growth develops in different stages, which are primarily divided into the seedling, vegetative, and flowering stages. Ideal temperatures and humidity for plant growth typically start high for seedlings, decrease slightly for the vegetative stage, and are lowest for the flowering and late flowering stages.
Interestingly, plants in each stage of plant growth prefer the environment. Let’s dive in to see the best temperature and humidity level for each stage.Â
Seedling Stage
In the seedling stage, maintaining a temperature of 20-25°C and a high humidity level of 65-70% is ideal. Young seedlings require warmer and more humid conditions to encourage strong root growth and rapid early development.
Vegetative Stage
During the vegetative stage, the temperature can be raised slightly to 22-28°C with a lower humidity range of 40-60%. At this stage, the plants focus on producing leaves and stems, and lower humidity helps them absorb more nutrients through their roots.
Flowering Stage
For the flowering stage, temperature should be kept between 20-26°C with humidity levels further reduced to 40-45%. This prevents mould and mildew from forming on the buds and promotes healthy flower growth.
Following is the grow tent temperature and humidity table for the plant life cycle
Growth Stage | Temperature | Humidity |
Seedling Stage | 20-25°C | 65-70% |
Vegetative Stage | 22-28°C | 40-60% |
Flowering Stage | 20-26°C | 40-45% |
Late Flowering Stage | 18-24°C | 30-40% |
How to Adjust Humidity & Temperature in Grow Tents
Humidity and temperature are essential elements that have a major effect on indoor gardening success. Giving your indoor plants the proper care will guarantee that they flourish, grow vibrantly, and retain their general health and strength. Here are some useful points to keep indoor plantations in the best possible conditions:
For optimal growth conditions, it’s important to have the right tools. A thermo-hygrometer helps track temperature and humidity accurately. An energy-efficient air conditioner with heating and dehumidifying functions maintains balance while saving costs. An oscillating grow fan ensures proper airflow circulation. A smart dehumidifier and humidifier with sensors and timers allow precise moisture adjustments. A compact, thermostat-controlled heater keeps warmth consistent. Together, these tools create a stable and healthy growing environment.
How to Increase or Decrease Temperature in a Grow Tent
Adjust indoor temperatures as necessary with fans, air conditioners, or heaters. Plants should not be placed next to drafty windows or vents because they may suffer from abrupt temperature changes. Chiang and his colleague (2020) explained that excessive heat in your growth room doesn’t just disturb plants but also actively shuts down photosynthesize effectively.
LED grow lights produce significantly less heat than HPS lights, making them a great option for lowering your tent’s temperature
How to Increase or Decrease Humidity in a Grow Tent
If temperature control is required, humidity control is essential for survival. To increase humidity in a grow tent, using a humidifier is the most effective method. Alternatively, placing buckets of water inside the tent and hanging damp towels can help raise humidity. Other methods include lightly misting the plants, lowering the temperature, or increasing plant density. To reduce humidity in a grow tent, use fans to enhance airflow and a dehumidifier to regulate moisture levels. Properly space plants for better circulation and consider air conditioning to further lower humidity.
Choose the Right Equipment for Grow Tent Climate Control
Sometimes, to maintain humidity during the crucial growth cycles, specific equipment is needed that amateur solutions cannot supply. Commercial-grade dehumidifiers, such as the Coairo dehumidifier, which is affordable and offers exceptional performance depending on growth requirements, may occasionally be superior to home-grade dehumidifiers.
One advantage of the Coairo dehumidifier is its highly accurate control features, which can be automatically modified based on the ambient sensors’ output. They have a steady level of humidity despite dramatic changes in the environment during the day and night. By controlling humidity, Coairo dehumidifiers limit the growth of mold, mildew, and dust mites, which can trigger allergies, asthma symptoms, and other respiratory issues. Coairo dehumidifiers guarantee adequate nutrient uptake and transpiration by preserving ideal humidity, which results in vivid foliage and increased plant yields.
Conclusion
In conclusion, creating an optimal grow room environment with the right temperature and humidity is essential for your grow tent plant. By maintaining the ideal conditions for each growth stage and using the proper tools, you can achieve consistent growth, vigorous plants, and a high-quality harvest. Check out our commercial-grade Coairo dehumidifiers; they are custom-made units that are used in an indoor growing setup. They are climate control systems built to order, which will give you the precision and reliability that your process demands.
We can get you the right humidity control solution for your setup. Our expanding experts will assist in developing a climate control system that excludes conjecture and ensures the most productive environmental circumstances your plants require to achieve the maximum genetic potential.
