General Organics is fine for soil as well; the supplements are good used as recommended (i.e. Bio-Root and Bio-Bud; Diamond Black which is a liquid humic acid extract). GO and Earth Juice (Grow, Bloom, Catalyst, Microblast) are both good for convenience, and either line of products can be useful to have around. When using Earth Juice, make sure your potting mix is properly limed. You can aerate Earth Juice prior to using (it'll bring the pH of the solution up after 36+ hours), and use in AACT with castings or humus.
In the past, it seemed cheaper to just buy the GO-Box, but this may not be the case any more and you don't really need all of the products. You could get powdered humic acid and kelp extract, or kelp meal and get more mileage out of them as opposed to the Diamond Black and Bio-Weed liquid products. CaMg+ is good to have if you use rain, reverse-osmosis, purified bottled or otherwise low TDS water. You probably only need 3-5 ml per gallon, so it can be made to last a while. Otherwise, use dolomitic limestone.
That leaves Bio-Marine (liquid squid fertilizer), each of the one-part Bio-Thrive formulas (Grow/Bloom) and the Bio-Root and Bio-Bud supplements (organic acids, rock phosphate, kelp and plant extracts, etc). Bio-Marine is probably what I use most frequently out of that entire line and you can use it in both Grow and Bloom, as well as for young plants.
What you and others should know, however, is that growing "organically" is about more than just changing the brand of fertilizer you use. In fact, it could be even simpler than that. There is more to organics than just "natural" versus "synthetic/chemicals", though. Organics is about living organisms. In fact, "organic" means "derived from living matter". In nature, plants derive their nutrition directly from or via the help of other organisms, particularly micro-organisms. As 'organic' or once living matter decays, as it does in compost, the result is humus and plant usable nutrients. Humus itself is essential to supporting plants in their natural environment for a variety of reasons (too many to list here now).
The more important thing to know is that microbes play a central role in extracting the nutrients out of soil, for plants. They live predominately in the rhizosphere, in direct contact with roots. They include bacteria/archaea, fungi (mushrooms, molds, yeasts), protozoans and nematodes. Microbes are either living in symbiotic association with plants, elsewhere in the soil, or they are eating other microbes in the soil (releasing nutrients within them). Certain bacteria and archaea fix Nitrogen out of thin air, along with everything else they do (e.g. produce antimicrobials, organic acids, plant growth hormones). Various fungi (mycorrhizae) live in intimate association with plant roots and go looking for water and minerals that would otherwise not be plant available (particularly phosphorous).
Other microbes benefit plants simply by not being bad, taking up space and releasing nutrients as products of their metabolism. Some microbes attack various plant pests/pathogens; microarthropods and even larger bugs also attack other insect pests (Hypoaspis mites attack other pests eggs, larval and pupal stages living in the soil, Lady Bugs and Praying Mantises eat a variety of pest insects including spider mites, thrips).
The bigger picture is that there is a food web here, the soil food web, and it works constantly to feed and protect plants.
