hey dude, i've never grown the same weed twice well at least not under the same conditions,any how the smallest amount i've harvested of any grow was about 1/4 ounce dry off 1 plant but that was an early grow and i've gained abit of experience since. just give it a shot its easy and fun, start with 1 or 2 cheep cfl bulbs and upgrade as you go,get good strain to start with like a skunk they're easy grow,easy clone and a hardy resilient plant, make sure the soil is right and all you need is water until they start flowering.