Greenhouse Humidity

When you have moved beyond growing in pots, the greenhouse will take your rowing experience to the next level. The use of portable greenhouses allows you to maintain the temperature inside. This allows plants to grow more quickly than in a completely open environment, without worrying about the effects of rain or sun. 

But what you need to know is that humidity in the greenhouse is something you need to control. Moisture in the air is important for plants, but too much humidity encourages pathogens and pests.

So, for the good of our guests who have greenhouses. This article contains information about greenhouse humidity and ways to control it so that you can get more techniques for gardening.

Inside Quictent greenhouse

(Inside Quictent greenhouse) 

Understanding greenhouse humidity

Humidity is a measure of the amount of water vapor in the air. It has a huge impact on the transpiration, photosynthesis, and pathogenesis of plants in the greenhouse.

Effect of Greenhouse humidity

When air humidity is too high, transpiration is weak and the plant's ability to transport mineral nutrients is reduced. Plant growth will be inhibited, resulting in a lower plant growth rate, increased leaf shedding, and reduced vitality. 

At the same time, too much or too little air humidity will cause the stomata to close, so that oxygen cannot enter the foliage cells and photosynthesis is slowed down.

Moreover, high humidity can also cause water condensation on the leaf surface and make the plant soft. One of the main problems with high humidity is that the village directly contributes to the propagation of diseases and pests. Low humidity, on the other hand, can lead to soil drought and plant wilting.

Caring for plants in the greenhouse

(Caring for plants in the greenhouse) 

In general, the air humidity in the greenhouse is 50% to 80%, and the temperature is optimal at 60 to 80 °F. The appropriate humidity for fruits and vegetables is 50% to 60%. The appropriate humidity for melon growth is 40% to 50%, and 50% to 70% for bean vegetables.

Many factors affect humidity, including soil moisture, airflow, temperature, etc. Meanwhile, watering is also a factor that affects the humidity in the greenhouse.  If not done properly, it will cause the humidity in the greenhouse to increase drastically.

Techniques for increasing humidity in Greenhouses 

If you are in an area with warmer temperatures or greenhouse plants that need high humidity while still young, here are a few techniques to increase greenhouse humidity.

Fogging systems

An automated fogging system can be installed to turn water into a fine mist to spray inside the greenhouse and on plant surfaces to increase humidity in the air.

Fogging systems for greenhouse

(Fogging systems for greenhouse) 

Using buckets of water

This is the easiest way to add humidity to a greenhouse, by placing buckets filled with water next to the plants. Allow the moisture to evaporate into the air.

Drip irrigation

Watering plants with a drip irrigation system allows water to drip into the soil regularly. Keeps the soil moist while helping to raise the humidity level in the greenhouse.

Drip Irrigation for greenhouse

(Drip Irrigation for greenhouse) 

Shade sails

Covering the greenhouse with shade sails can help reduce the amount of sunlight and heat entering the greenhouse, which can help increase humidity levels.

Techniques for reducing humidity in Greenhouses

And if your greenhouse is already humid enough, then you will need some way to reduce the humidity.


The best way to reduce humidity in a greenhouse is to ventilate it. The time to ventilate and dehumidify is at noon. Because the difference between the humidity inside and outside the greenhouse is large at this time, and moisture is easier to discharge. At other times of the day, we need to extend the ventilation time as much as possible while maintaining the temperature requirements.

Luckily,large greenhouses provided by Quictent have roll-up doors and windows for ventilation, which is more convenient. And there is a layer of screen mesh design inside the door and window, which can also prevent mosquitoes from entering while maintaining ventilation.

Quictent large greenhouse

(Quictent large greenhouse)

Heating up

Control of humidity in the greenhouse can be done by raising the temperature. To do this, it is recommended to not ventilate in the morning and to raise the temperature without harming the plants. This way, as the temperature rises, the humidity drops.

When the temperature rises to a suitable temperature, ventilation begins. Or use heaters placed in the greenhouse to allow the temperature to rise, which can also be used in winter to maintain the greenhouse temperature.

Quictent greenhouse with sunshine

(Quictent greenhouse) 

Reduce watering

Control the amount of water used and reduce the number of watering times to reduce humidity in the greenhouse. Based on meeting the crop moisture requirements to minimize the number of watering times. For example, on cloudy days, when the humidity of the outside air is sufficient, you can skip watering.

Tips for monitoring humidity in the greenhouse

Monitoring the humidity in the greenhouse at all times will maintain a healthy plant-growing environment. The easiest of all monitoring methods is to check the condition of the plant leaves. If it has browned and the soil is too moist, this is a sign of high humidity.

Of course, these only prove that the humidity is high. If you want to know the exact humidity level, you can hang a hygrometer in the greenhouse. It usually comes with a thermometer as well, so you can observe the changes in humidity and temperature at the same time.

Hygrometer in the greenhouse
(Hygrometer in the greenhouse)

You can also buy an alarm hygrometer if you have enough budget. This electronic detector can measure the humidity more accurately and can also alert you through the cell phone program.


When we weed, fertilize, and water our plants in the greenhouse, it is important to know that these are only a small part of gardening. The choice of fertilizer, seeding or transplanting, humidity, and temperature in the greenhouse are all things that need to be understood and learned.

If you are confused by the humidity in your greenhouse, try these tips and techniques to help your greenhouse plants get a good growing environment. Remember to try different techniques to find the best one for your particular plant and climate.

Gardening tipsGreenhouseGreenhouse adviceLifestyle