Medical cannabis cultivation is on the rise, but disease outbreaks are leading to reduced quality and large-scale crop loss. These diseases share a common culprit – humidity.

The demand for medical cannabis is constantly growing, driving the cannabis industry to expand accordingly; more licenses equal more growers, more yield equals greenhouses instead of private/small facilities. Growing in closed facilities including greenhouses requires the grower to take into account the issue of humidity.

In a heated closed area, humidity can reach a 100% level. This level of humidity combined with the plant’s natural evaporation causes “free water” to accumulate on and between the cannabis flowers’ leaves which ultimately leads to the appearance of humidity diseases such as botrytis.

Ventilation Vs. Dehumidification:

The traditional solution to treat humidity is ventilation. Ventilation means opening & closing the growing facility in order to replace the inside humid air with external dry air. While it may be effective, there are 3 main problems:

Loss of energy – opening the growing facility leads to loss of warm air which then leads growers to use more energy in order to reheat the greenhouse.
In some cases, the air outside is more humid than the air inside the growing facility (on rainy days, cloudy days) and then ventilation is ineffective, even the opposite.
Lack of uniformity – inserting external air creates different conditions of temperature and humidity inside the growing facility. This difference in climate conditions affects the growing process and the development of the plant and leads to lack of uniformity of yield.

DryGair’s solution to cannabis humidity problems takes a different approach

DryGair’s dehumidifiers are positioned inside the growing facility, enabling the grower to keep the growing facility closed so there is no energy loss. The DryGair dehumidifier sucks the humid air, warms it and returns it to the growing facility warmer and drier. DryGair dehumidifiers have 3 main advantages:

In summary, the growing demand for medical cannabis leads cannabis growers to move into larger closed growing facilities forcing them to take into account the negative effects of humidity on cannabis and subsequently decide on the most efficient solution.