Botrytis, downy mildew and Alternaria are only three of the humidity diseases that can harm the cannabis plant.

Because cannabis is very sensitive to high humidity, it is not surprising that growers seek a solution. The solution for humidity diseases is controlling the humidity, using dehumidifiers.

If you ask yourself why we only mention dehumidifiers, and not humidifiers, the answer is simple. In an isolated environment (a growing room, a warehouse or a greenhouse) with plants (all plants, not only cannabis), the humidity will always go up to 100%. The plants keep evaporating and the amount of water in the now humid air (regardless of the temperature) is increasing continuously. Therefore there is no need for humidifiers in a closed growing environment.

What is the most suitable dehumidifier for my cannabis plants?

There are many humidity control options on the market. Most of which were designed for traditional use such as small storage rooms, warehouses, pools, industrial buildings, houses etc.

Plants evaporate a significant amount of water and flourish in higher humidity levels than people. Therefore plants require a unique dehumidifier that is designed to answer their needs.

DryGair was designed based on greenhouse needs. DryGair’s engineers calculated the amount of water the dehumidifier should remove from the air. Taking into consideration the amount of water the plants evaporate, and the required relative humidity level.

In order to grow high-quality yield in cannabis, growers need to prevent dew point condensation inside the growing area/greenhouse and circulate the air, so humidity does not get trapped inside the flowers.


Elad (a cannabis grower from Oregon, USA). He’s been using DryGair dehumidifiers for more than two years now.

DryGair is a patent-protected concept and solution exactly because of the innovative initiative- creating a special dehumidifier based on the agricultural growing needs. Cannabis growers can see and feel the difference, compared to a regular dehumidifier, immediately.


For more on humidity related diseases read head over to our article on Humidity Woes