try these nutes called "heavy harvest" just go on google and type in heavy harvest nutrients and it should provide you with the manufacturers home page. the nutrients come in 3 phases: 1 spring packet, 1 summer packet, and 1 fall packet (harvest). i am currently using these right now. 2 of my plants that are using it are 6 feet tall and the other 2 are 5 feet tall. their stems are that of a small tree!! this stuff is amazing. it is suppose to triple the yield.