I second that (fish) emulsion!

With this job, I inherited a 40 gallon bucket of fish emulsion... which I have never used before. I can testify. This stuff rocks! At work I use something with the word Neptune in it and it doesn't smell too bad. At home I used some super concentrate I got at The Growing Place that brought the flies around! And then my cat jumped in the houseplants I had dosed and all hell broke loose. But anyway, it rocks- I can't say enough about it.
You can really crank up the volume because it can't burn the roots. It's all up to what you can handle smelling!