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 is a room/grow tent/grow box, lights, fans, timers, reflective wall material, hydroponic system or soil and containers or beds, thermometer, hygrometer, air filter (carbon or HEPA), pH meter or test kit, TDS/PPM meter, fertilizer and plants.
The best lighting will depend primarily on the size of your space, room or grow tent. H.I.D. lights and T5 fluorescent lights are the most commonly used for indoor gardens. But, Ceramic Metal Halide (CMH), Double-Ended and LED lights are becoming the next generation of indoor lighting and can be great choices depending upon your space.
Having a timer running your lights is extremely helpful. For vegetative growth run an 18 hours on and 6 hours off and for bloom phase run 12 hours on and 12 hours off.
You always need fans in your grow room. Air circulation is very important for growing healthy plants.
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. Typicallly you will not exceed 1800ppm.
A clone or cutting is a rooted shoot from a host or mother plant. The clone is an exact genetic replica of the mother plant.
Clones can be rooted many different ways. You can use an aeroponic clone machine or rock wool cube, jiffy pellet or starter plug to root the cutting. The latter method requires more a humidity dome and tray and takes longer to root.
Take a healthy mother plant and find a healthy shoot with an active growing tip. Cut this shoot 6"-8" from the tip to the nearest node at a 45 degree angle. Dip in rooting hormone and place in machine or cube/plug inside dome.