yeah man, its just a massive con by the companies selling all these poisons. once you have it your hooked, because your plants can no longer survive without more and more chemicals.
I was reading in an organic mag, and they were like look at the rainforest, such a collosal, huge weight of...
you should inoculate your plants with Mychorrhizal fungi. When a plant teams up with the fungi, hyphal strand go out further into the soil than the root can, multiplying the available surface area of the roots by ten to hundreds of times.
Anyways it really speeds up growth, but you cant use it...