Without proper airflow, a grow space can experience rapid changes in humidity or develop pockets of CO2 depletion, neither of which are good for plant growth. CO2 depletion can lead to nutrient lockout, and areas of high humidity are prone to pest infestation, mold, or mildew.
It can be tricky getting the right balance of temperature and humidity because they affect each other—turning up your dehumidifier will lower the humidity of your grow space, but it will also increase the temperature of the area. This in turn may require you to turn on an AC unit—everything’s connected!
Although it’s more resource-intensive than growing outdoors and you will likely have to spend more money on utilities to power equipment, you can control every aspect of your grow environment and what you put in your plant, allowing you to dial in your setup to grow some primo weed.
You can let your plants get as big as you want, and can control when they flower and when you harvest, and you can start another batch right away or whenever you want. You can grow any time of year, even straight through winter or summer, and you’ll get consistent crops each time.
If your space is too humid, you may need to invest in a dehumidifier—also known as “dehueys.” However, keep in mind that while dehueys will reduce humidity, they typically increase temperature—you may need more fans or an AC when adding a dehumidifier.
Trimming , training, and manipulating cannabis strains can really help them flourish and produce bigger, denser, and more potent flowers.
Below, you’ll find a complete walkthrough of all the basic concepts involved with growing great weed indoors.
Our Starter Kits come with feminized or autoflowering seeds and a propagator, making it easy to create the perfect environment for your seedlings.
To automate th e light cycle.
A new study published in Nature Sustainability on Monday aims to quantify the climate impact of indoor cannabis cultivation across the country. The authors, who are researchers at Colorado State University, wanted to track how greenhouse gas-intensive these operations would be if they were set up anywhere in the country.
To figure out just how carbon intensive growing weed is, the team of researchers developed a model to track the energy and materials used for the kind of indoor warehouse-style growing operation that 41% of American growers use. The model was designed to mimic an actual typical warehouse, complete with HVAC, grow lights, pesticides and fungicides, water applied through drip irrigation “at an average rate of 3.8 liters per plant per day,” and more.
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Since temperatures and humidity across the U.S. vary widely, the authors’ model calculated the energy needed to maintain these indoor climate conditions by using a year’s worth of hourly weather data from over 1,000 locations countrywide. By using electrical grid emissions data from around the nation, the model then showed the greenhouse gas emissions that all that required energy would produce. In addition, the model accounted for the “upstream” emissions from producing and transporting water, fertilizers, fungicides, and bottles of carbon dioxide to grow houses, and also tracked the “downstream” greenhouse gas pollution from all the waste these operations send to landfills.
Many cannabis growers prefer indoor cultivation to outdoor because it offers greater control over the plants’ habitats and more security. But these indoor operations come at a cost to the climate, since they require heating, ventilation, and air conditioning to maintain ideal temperature and humidity levels and high-intensity grow lights which stay on around the clock. They also often pump in a regular supply of carbon dioxide to speed up plant growth and increase profits.