In this short blog, we will be discussing a common problem faced by both beginners to the professional grower and that delicate balance between temperature and humidity for growing weed plants. If these controls are off in either direction, it can create a problem at any time. All growers fear the wrath of the mould due to the potentially disastrous effects it can have on your harvest. While at the other end, not having enough moisture for your plants can also have a detrimental effect on their growth capacity.
For starters, some basic knowledge about temperature control and relative humidity can help us maximize the growth and flowering of marijuana plants. Varying degrees of moisture can lead to problems on both ends. It is vital to pay close attention to the temperature and moisture levels in your environment. If you plan to grow outdoors, it will be harder to control those conditions, which is why it is crucial when finding the perfect location to grow your plants. If you get the moisture correct, you can affect the quality of the harvest, which will be noticeable with your final product.
What does DPV stand for?
When talking about temperature and humidity in a closed system, it is necessary to refer to what is known as vapour pressure deficit or DPV. This factor relates to the difference between the amount of water vapour that can be concentrated in the atmosphere, which depends on the temperature, and the amount of water vapour in the atmosphere at any given time (humidity). If we can achieve the correct temperature and moisture to our weed plants, the DPV will be at the appropriate levels to maximize the volume of the harvest.
But what is the ideal level of DPV you ask? This is where things get a little more complicated. It is recommended that this parameter be maintained at a level of between 5 to 12. To be more specific, the best range is between 7.5 to 10.5. In these barometers, plants manage to open their stomata and release a decent amount of water vapour into the surrounding environment. The result is increased transpiration, which in turn causes an increase in the photosynthetic activity of marijuana plants. During this time, always consider the nutritional demands of the weed plants in that they will require a greater supply of nutrients to maximize this process.
If the DPV exceeds the barometer of 12, less humidity in the air which will suck moisture from the plant, the plants will close their stomata so that as much water does not evaporate. The consequence is excessive perspiration that would lead to dehydration. On the contrary, if the DPV is too low, the plants would also close their stomata, but in this case, they would have already reached their maximum water retention capacity. Therefore, transpiration is reduced and, with them, photosynthesis, which affects its performance and growth.
We found once we really dug into the science aspect of this part of the growing, it was extremely interesting to think you might be able to create this perfect growing space. However, pulling it off in real life was a lot harder as beginner growers. Do not get discouraged if this topic can seem overwhelming at the beginning; remember knowledge is power here, so do some more in-depth research to really learn about these controls. In some cases, it is literally the difference between a good and a great grower.
How to control the temperature and humidity in indoor crops?
When growing indoors, the conditions can be completely manipulated by the growers themselves, so it is desirable to try to create conditions your plants will thrive in. One major difference when growing indoors is the necessary use of artificial lighting equipment, which become your plants only source of light. Another is air circulation and air extraction. With these resources, it is possible to control the climate in your indoor system. You may need to invest in some fans in order to create a system where you can circulate air. In particular, they are used to create airflow so your plants can breathe. They also have the function of injecting new and fresh air into the crop.
If you prefer, you can choose independent climate controllers. They connect to any device and can give you the possibility to control the temperature and relative humidity that is generated in the culture space. These devices also allow you to modify the speed of the extraction equipment to adjust it to the conditions of the environment, depending on whether it is very hot or very humid. You can connect several devices to climate controllers, such as air humidifiers or fans.
The temperature and humidity values that you set in the climate controller will mark the operation of all the devices you connect to it.
If you have optimized your indoor space for your weed plants frequently more experienced growers will choose to add CO2 to the environment to optimize crops.