Title says it all. How big will a marijuana plant get?? I don't want stories about how your friends friend had one 30 ft tall. I want proof!!! I put a plant out this year that was about 24" when i put it in the ground, it just made 8' 4". I want to start one soon indoors and put it outside in the spring at 6' plus. Will it grow huge or will i just be wasting my time??? Post your pics of your monsters. Please don't put your 4'6" girlfriend next to it and say its 9'............ Here is a pic of my 8+ footer and my 6' kush. For comparison, i'm 6 feet tall.