Most people go for osmocote plus in their root tabs. It's a complete fertilizer that has all of the essential macro (NPK) and micro nutrients your plants will need! Just buy some cheap gel capsules on amazon or ebay and fill them with the osmocote plus and you're good to go!Never made my own Root tabs can use some help in what ferts to get. any one with exp... please help me out. I have been researching it, But their are so many different opinions. could use the advise.