The homedepot fertz are nothing to write home about, there just a basic 10-10-10 slow release granules very similiar to heavy harvest, though not nearly as expensive. It sounds like you have the organic department on lockdown if i were you i wouldnt be looking anywhere but at my plants at this point.
Foxfarm marine cuisine is something i would look into, for the most part its organic and i mixed it in at a tablespoon per gallon of soil and then let it cook for several weeks, ive fed my plants nothing but water so far and there doing fine. I know it can also be used as a topdressing, just something to look into if you like that premixed ready to use style of fert. Personally you cant go wrong with a good compost/EWC tea with fish kelp and alfalfa weekly. That and a top dressing of hi phos guano should give you all you need, or you can just incorporate the guano into the tea itself.
Your doin old school or actively aerated teas? I highly suggest the aerated if you havent stumbled upon it yet, the difference an air pump and a couple of aquarium stones makes is a world of difference. Good luck keep postin those questions