Once you've decided to grow your marijuana plants indoors, your next step is to figure out how exactly you are going to do it. There are a number of factors to consider when setting up your growing environment indoors.
Whether it's the temperature or humidity of the room, the carbon dioxide level, the ventilation or the smell, you are going to have to arrange everything perfectly so you create the ideal environment for your marijuana plants.
Although this may seem like a huge amount of effort at first, it has a huge payoff once you harvest. The only thing you might regret is not researching or preparing enough ahead of time; if you put in the work ahead of time, your result will be well worth it. This article will cover the following key elements of creating and maintaining a proper growing environment for your Cannabis.
Although it can vary somewhat between varieties and strains, the best temperature for Cannabis to grow in is usually somewhere between 68-77 degrees (20-25 Celsius). If the ambient temperature around the plant drops much below this, the growth of the plant will slow and its potential yield will be inhibited or possibly even stopped entirely, if the plant never matures. It's good to note that this temperature is most important during a “day” cycle when you are letting the plant get light. That's when photosynthesis and the potential for growth occur. Still, you don't want large temperature swings between day and night if you can avoid it.
If the temperature of your plant rises up above 77 dergees (25 Celsius), the metabolism of the plant will accelerate, and it will require additional inputs: more light, more water, more carbon dioxide, and more fertilizer. Make sure you plan accordingly for changes in temperature, whether intentional or otherwise. It's wise to invest not just in a thermometer, but a thermometer which is attached to a ventilation and heating system, so that it can automatically manage the temperature of your grow room. A working automatic system can also provide you with excellent ventilation for fresh air and avoid carbon dioxide shortages.
Source : ILGM