The temperature in your marijuana grow room is one of the most important factors you can control. It affects growth, health, yield and quality. Having the right temperature in your grow room is vital for your plant to photosynthesize. If the temperature is too low, it will lessen the evaporation through the leaves and cause the suction force to shrink, which affect how nutrients are consumed by the roots.
Required nutrients will haven’t been consumed will stay in the growing medium and over time dissolve in the root system. A growing medium that is highly acidic lessens the effort the roots put in which leads to the plant taking in less water and nutrients, and it may stunt the growth.
The right temperature in weed grow room
There are many things that determine the temperature in your grow room. Where you grow room is situated in the home is critical. For instance, it is much cooler in the basement than it is in the attic. Also, room size, air flow, how many lights you have and the extraction amount all have something to do with it. You will need to consider this when creating a grow room.
When the light is on, the best temperature for seedlings and cuttings is from 68*F to 77*F. Once your plants mature, they can handle even more and the temperature could rise to as much as 82*F. If the light is off, the temperature needs to be around 62*F to 72*F.
Measuring the temperature in your weed room
The temperature in your room should be measured with a thermometer. You can find both digital and analog thermometers in several locations for only a few dollars. I usually prefer a digital thermos/hygrometer, which has a built-in memory,
Remember only to measure the temperature in a shaded area and different parts of the grow room. Put a few fans in the room for good air flow. Lamps will not change the air temperature, but it will usually be a little warmer under the lamp than it is in the shaded areas. This is nothing to worry about, just be sure there is enough space between the lamp and the plant.
How to lower the temperature of your weed grow
To extract heat, use this easy method; the amount of watts divided by two = extractor in cubic meters (feet). So, 2 x 600 watt HPS needs an extractor fan of 600 m3. Extractor fans blow the hot air out of an area and bring in fresh air. You can even add a carbon filter to ensure the marijuana smell doesn’t go out of your room. Using ballasts placed outside of your grow room also creates plenty of heat, so check for that too.
Raising the temperature in your weed grow room
It can become cold in the room when the lights are off. To raise the temperature use a space heater with thermostat to heat up your grow room. Just keep in mind that they use a lot of electricity. Also, radiators with thermostats are good as well. You can even turn off the extractor fan when the lights turn off. You can do this with a fan controller that has a thermostat, or a timer.