Agree with @PadawanWarrior He turned me on to the fish & seaweed a couple of years ago during a outdoor grow. Stuff worked like a charm. It worked to well for our pumpkins, after we fed them they actually burst and scarred over, learned how the ugly pumpkins are grown was the plus side.
I start with a self made organic soil using chx manure and plant tone/ bio tone dry amendment mixed into the soil. The plants get watered 60% of the time with Neptunes harvest through out the grow cycle.