Optimum humidity in a grow box

Air humidity is one of the main parameters, which is important to monitor so that your plant is happy and fully developed. But first, let’s understand the definitions. Are you need to reed 100 watt led grow light reviews?

Absolute vs Relative humidity

There is relative and absolute humidity. Absolute air humidity is the amount of water vapor particles contained in 1m 3 of air.
As for the relative humidity, things are a little more complicated here. Relative humidity is the ratio of absolute humidity to the density of saturated water vapor, taking into account temperature, and is expressed as a percentage. If simpler, the higher the temperature, the higher the humidity can be.

Plant physiology and the role of moisture

In the process of transpiration (the process of movement of water through the plant and its evaporation through the external organs Ⓒ Wikipedia ), the plant evaporates the absorbed water through the leaves, thereby lowering its temperature.
The level of humidity affects the rate at which water moves inside the plant, the higher the humidity, the slower the evaporation. The low moisture level forces the plant to expend additional energy to evaporate water. High moisture levels prevent the plant from cooling effectively. At 100% humidity, the evaporation process stops completely.

Significant fluctuations in air humidity in a short time can harm the plant. An increase or decrease in humidity by 20% -30% in a short period of time leads to damage to the cell structure of the plant. Since the processes in the plant are slow, with a sharp increase in humidity, the plant will continue to accumulate water in the leaves and fruits without the possibility of evaporation.

Optimum humidity level in a grow box

Recommended values ​​for relative humidity in a grow box are in the following ranges:- from 60% to 70% under normal conditions;
– not less than 80% for germination of seedlings and rooting of cuttings;
– below 50% during flowering.

Devices for managing humidity in a grow box

  • Thermometer with hygrometer ;
  • Wet expanded clay or sand, a simple and cheap way to increase humidity;
  • Air humidifier. You can find humidifiers of various sizes on the market, when choosing, first, you need to take into account the area of ​​the grow box.

To reduce humidity, we recommend:- Airing will help in any situation. This also includes a well-established ventilation and air exchange system;
– Dehumidifier with hygrostat.

A word behind automation

If the scale of cultivation exceeds one grow box, automation can come to the rescue. Control over the indicators of humidity and temperature can be entrusted to such a device as Microclimate from E-mode. The device is designed to maintain a “comfort zone” for the plant. For convenience, the device has a built-in LCD display, which reflects all the necessary information. Also, the system is equipped with a timer that automatically turns on and off the devices used: heater, air conditioner, lamp. This way you can save tons of time.

What is the result

Humidity, along with temperature, is an important parameter that must be monitored throughout the entire growing cycle of plants. High humidity levels can lead to mold growth, low levels can slow down plant development. Observe the rule of the golden mean and big harvests for you!

Leave a Comment