Growing Environment Questions

A grow room is a space, usually indoors, that is designed to house and grow plants. 

The common things you will need to get started are a room, grow tent, or greenhouse. If you building out your own space rather than using a grow tent, you'll want reflective film or ultra-white paint to cover your walls. You'll also need grow lights and timers to encourage proper growth. For ventilation, you'll want oscillating fans, an inline fan, ducting, and an air filter (carbon filter for smell or HEPA filter for removing impurities). You'll need a thermometer and hygrometer to monitor the environment. To feed your plants, you'll need fertilizer, pH meter or test kit, and a TDS/PPM or EC meter. Finally you'll need either a hydroponic system, or containers and soil. And, of course, plants or seeds.

The best lighting will depend primarily on the size of your room or grow tent. T5 fluorescent lights, Metal Halide (MH), Double-Ended, and HPS are all common, but LED lights are the next generation of indoor lighting and a great choice. LED lights are comparable in price, but will save you money in the long run in electricity and bulb replacements.

You always need fans in your grow room. Air circulation reduces the chance of mold or mildew; and wind resistance increases the strength of your stems and stalks, so they do not fall over as easily.

The temperature and humidity can vary depending upon your crop. But typically between 60 - 80 degrees and 30% - 60% for the humidity is acceptable for most plants. 

Co2 is always present indoors with levels between 300ppm-600ppm typically. You can always supply more to the plants thru Co2 tanks, burners, or other methods. Typically you will not exceed 1800ppm.