Temperature and Humidity in Hydroponics: Effects on Plant Growth

One of the most important aspects of hydroponic gardening to understand and master is the effect on plant growth by temperature and humidity.

Read on below and learn all about how temperature and humidity affect plant growth in hydroponics, as well as tips on controlling these factors using fans, heaters, or dehumidifiers if necessary:

The Effects of Temperature and Humidity on Plant Growth in Hydroponics

Temperature and humidity are critical factors that affect plant growth in hydroponics in numerous and profound ways. Some of the main effects caused by these factors are stunted growth, yellowing of leaves, and an inability to uptake nutrients, water, and air. To say the least, these environmental conditions have a significant impact on the overall health and yield of your plants.

In the following sections, we further discuss the effects of temperature and humidity on plant growth in hydroponics and provide tips on controlling these factors using fans, heaters, or dehumidifiers if necessary.

Effects of Temperature on Hydroponic Plant Growth

• Optimal Range – Most plants thrive at temperatures between 65°F to 80°F (18°C to 27°C). However, different plants may require different optimal ranges.
• Growth Rate – Higher temperatures can increase the rate of plant growth but can also lead to heat stress which can damage or even kill your plants.
• Nutrient Uptake – Temperature affects nutrient uptake by plants as it influences enzymatic reactions responsible for breaking down nutrients.

Effects of Humidity on Hydroponic Plant Growth

• Optimal Range – Ideal humidity levels for most plants fall between 40 percent to 60 percent. Too much moisture can lead to mold, mildew, root rot, or other fungal diseases.
• Stomata Function – Humidity affects the opening and closing of stomata in leaves which is essential for photosynthesis.
• Transpiration Rate – High humidity levels reduce transpiration rates leading to reduced water uptake by roots.

Tips for Controlling Temperature and Humidity in Hydroponic Gardens

Now that we’ve discussed the effects of temperature and humidity on hydroponic plants, let’s look at a few of the most significant ways you can control these factors.

Use Fans to Regulate the Temperature and Humidity

Install fans around your hydroponic garden area to improve air circulation and reduce high temperatures or humidity levels. Using fans is the number one method for regulating proper temperature and humidity in hydroponics.

Use Heaters or Dehumidifiers to Lower or Raise Humidity and Temperature

If you are growing plants in a cold environment with low humidity levels or during winter months when outdoor air is too dry, use heaters or dehumidifiers accordingly to maintain proper conditions.

Monitor the Temperature and Humidity Regularly with a Thermometer/Hygrometer

Use digital thermometers/hygrometers to monitor temperature and humidity levels regularly so you can adjust accordingly when needed. These tools are priceless for hydroponic gardens and are easy to learn how to use.

A Final Word About Temperature, Humidity, and Hydroponic Plant Growth

Hopefully, this article helps you master the proper temperatures and humidity levels of your hydroponic garden – and keep your hydroponic plants healthy and happy!

Just remember: by understanding how temperature and humidity affect plant growth in hydroponics, and taking steps such as using fans, heaters, or dehumidifiers where necessary, you can help ensure optimal growing conditions for your plants!

If you are new to hydroponics, we also recommend reading about the 11-Must Have Tools and Supplies for Hydroponics.

Thanks for reading. Do you have a question or comment? If so, drop us a comment below!

Suggested Reading: Why Monitoring pH Levels is Important in Hydroponics