I knew that autos needed less feeding, but I didn't realize how much less. I didn't start "fertigating" until the lant started stretching. Just water and the Bio Bizz LIght for the first 3-4 weeks. I went from a 9-10 inch tall green soccer ball to q 44 inch tall 2.5 foot wide lanky girl with thin branches. Hot mix made it go veg crazy maybe?