yeah pisses me off that people begin growing weed and dont have a first clue.i watched mr green on you tube over and over before my first attempt,which may i add was a cool 12 ounce of bud,he knows how to kick out the funk.
Please help!!i have similar problem 3 weeks into flowering have a 600 in my grow room a foot and half away from tips but many of my leaves have gone yellow too.i have a flood and drain system and water every 3 hours.i was told cf of 18 is spot on?? it must be root burn so what cf level should i...