I disagree with everybody who says read the Jorge Cervantez grow bible. It is a great tool but not the only source. The greatest source is trying it yourself. The bible will put you in the right direction, but is there really a person who can follow directions without trying it a little different way? Bible is invaluable though, when you are looking at leaves that are curling up. The bible has like 20 pages I think about the different nutrient issues. It is great for knowledge, but to gain the knowledge from reading my belief is you must use the knowledge and build. You will see if you follow a book the plants will work, but if you experiment a little with a couple plants you will learn a LOT more knowledge and know how to grow amazing plants!