This is your space for everything related to growing cannabis indoors. From lighting setups and ventilation systems to hydroponics and environmental control, share your knowledge and learn from fellow growers.
What to post here:
- Lighting choices: LED, HPS (high-pressure sodium lamps), CMH (ceramic metal halide lamps), and how they compare
- Ventilation, air filtration, and climate-control equipment such as fans, air conditioners and dehumidifiers
- Hydroponic systems, such as DWC (deep water culture: the roots hang in a tank of nutrient solution kept supplied with air by a pump)
- Coco and other indoor growing media (coco is coco coir, made from shredded coconut husk). See the growing media comparison.
- Temperature and humidity management: setting targets and fixing readings that drift
- Indoor grow tips, schedules, and troubleshooting
Translator’s note: In Thailand and Southeast Asia, an indoor room fights outside heat of 30–35 °C. In the rainy season the air is also very humid. Air conditioners and dehumidifiers often run most of the day, so electricity is a large part of your running cost. Power cuts can stop lights, fans and pumps at the same time. In a DWC tank, the roots lose their air supply as soon as the air pump stops. When you ask for help, mention these local conditions so the answers fit your room.
Before you post: give your light type, room size, temperature and humidity. With these numbers, other growers can compare your room with theirs and find the cause of a problem faster. If you want to follow a whole run, start a grow diary and update it each week. You can also ask your question directly in this section.
Note: All discussion here must follow Thai law. Cannabis flower is a controlled herb under the Notification of the Ministry of Public Health Re: Controlled Herbs (Cannabis), B.E. 2568. Check the rules that currently apply to your own grow before you start.