Air And Moisture
The air has to be constantly renewed so that plants continue to have a CO 2
(air content), as close as possible to the exterior, and if possible maintain a stable temperature, without crossing the strip between 15 and 30 degrees Celsius , An ideal temperature would be 20 ° C to 26 ° C.
The more plants per room or closet, the more powerful the air-renewal system, an exhaust fan will be the right appliance, as well as a good air intake from outside if possible.
It is also necessary to incorporate a fan inside the crop, this will be responsible for not creating air vitiated spaces and make the plants strengthen their stems and better support the weight of flowers.
The used air is heated by the action of the light system, and it must be extracted until it is left at an optimal temperature for the normal development of the plants. To all this, this air, that of the interior of the place of cultivation, has to maintain a constant humidity. More humidity than adequate can cause fungal infections and, below normal levels, can give the ideal environment to install a pest, such as the spider mite, mites, etc.
The relative humidity (% RH) will be the humidity that will have the volume of air of our room or cabinet of culture. We can be enough with 50% RH.
It is defined by: moisture containing a mass or volume of air, relative to the maximum absolute atmospheric humidity.
This is the most common way to express ambient humidity.
Example for a room: A complete crop cycle of 9 weeks duration and starting from seed.
If you have the means to do so, the first three weeks can be between 70% and 60% HR, you can start with 70% and gradually reduce to 60% in the third week.
For flowering, the first two weeks can be maintained at 50% RH, reducing to the end of the crop at 45/40% RH.
In order to better regulate the ambient humidity it is advisable to have a humidifier, so you can be sure that you work in the optimum conditions.