Espoma plant tone or tomato tone works good, I used it for years. The only downside is it is a slower release. I have since moved on to the Botanicare pure blend pro grow formula, huge difference, my plants really took off after I started using it. You might want to look to see if you have a hydro shop near you, as you will be able to find liquid fertilizer that will work a lot better then the products you find at depot, etc.