Cannabis, like all plants, prefers certain environmental conditions in order to thrive. Temperature, humidity, light intensity, and airflow are all factors that will need to be monitored and regulated in order to keep cannabis healthy through its different phases.
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When designing your space, you’ll need to take into account room for your plants, as well as space for lights, fans, ducting, and other equipment. You’ll also need space to work on the plants. Cannabis plants can double in size in the early stages of flowering, so make sure you have adequate head space!
When starting with clones or seedlings, you’ll want to check your plants every day because they’re delicate and sensitive to environmental conditions. You may need to adjust temperature and humidity levels in your indoor grow space at first to hit the sweet spot for your plants.
Compact fluorescent and LED bulbs produce enough light for plants to grow and even to flower, but high-pressure sodium (HPS) fixtures provide the most light in the spectrum that plants need during their budding stage. HPS lights can get hot, so you need a well-ventilated room to use them.
1. Turn Up The Lights
You want to keep the lights 18 to 36 inches above the tops of the plants. Check to be sure they’re not too hot by putting your hand under the lights at the same height as the tops of the plants—if it’s too uncomfortable for you, it will be for your plants as well.
2. Change Nutrients for Each Stage
As plants begin flowering, reduce the humidity in your indoor garden to 50 percent, enough to ensure that there is sufficient moisture during this intense stage of plant growth but not so much that you lose buds to mold. The simplest way to reduce humidity is through ventilation with outside air, which outside of tropical climates is closer to your ideal.
Lack of Pollination (Producing “Sinsemilla”)
Unfortunately, they don’t all match (for example some growers say to harvest in the morning, while others believe you get more THC if you harvest during the plant’s dark period), but these are the most common flushing techniques that I’ve heard to increase THC levels right before harvest.
Supplements to Increase THC and Overall Potency
In order to get your cannabis to produce the most potent buds possible, you need a robust, healthy cannabis plant with lots of bud sites getting direct light during the flowering stage. This means it’s important to avoid common plant health mistakes like overwatering, underwatering, heat stress, root problems, irregular light cycles, and nutrient problems. Check out our 7-step remedy to fix most cannabis plant growing problems. Try to maintain balance and avoid environmental extremes. Basically, treat your cannabis plant like it’s a celebrity – it gets everything it wants!
I wrote this section after reading the results of a 6-year study about industrial hemp. Although hemp is closely related to cannabis, they’re not the same thing so these findings should definitely be taken with a grain of salt. In the study the researchers found the following environmental factors were associated with higher levels of THC:
Why Increase Maximum THC Levels?
Plant Health & Care While Buds Form
Much of the THC and “potency” in your buds is contained in the sparkly trichomes