Nutrients are like ice cream, everybody has their favorites. I use Flora-Nova from General Hydroponics. There are different nutritional needs for plants in veg and plants in flower. You can keep it simple or get very complicated. In the end it is your decision. If you are new to growing as your qustion suggests I would advise to keep it simple for a few grows. There is a wealth of great info in the GrowFAQ located at the top of each page. Good Luck!