depends on many factors...genetics of the plant can dictate how big a plant will be, the growing environment, starting from growing medium that you choose for this grow to the quality and type of nutrients that you'll be using, the light if very important in the final yield. If the light is very powerful, to supplement the growth, add CO2 to the mix. Also, again, depending of the genetics, the way you grow and approach your grow can influence the yield (look up LST, topping, defoliation, HST, scrog for Auto plants)
Then there are some esoteric methods (have a look at my diaries) like exposure to magnetic or electro magnetic fields, ORMUS feeding, crystals, sound frequencies etc
My advise is to just experiment, get used with the process of growing and understand the physiology of this plant. Get in the rhythm of how the plant functions. Don't overwater!! when watering, just make sure you give as much as you'll get some run off at the bottom of the tray. Water only when the pot feels dry and light
Best of luck