There are organic nutes, and nutes derived from organic sources. OMRI certification is, shall we say, humorous. The hoops a company has to jump thru to gain that certification certainly isn't worth it, and the certification is no guarantee of the product being truly organic.
^ This is one of the truest statments i have heard in a long time. to many people on here think OMRI means something about organic's, what it really meas is a company has enough money to jump through the legal hoops.....
Organic constitutes only a few things when it comes to farming.... are the resources natural? and are they chemically organic? (Aka carbon based) and because of this there are many ways to grow organic, everything from store bought nutrients, localy harvested nutrients and composts, living soil, human waste reconstitution, composting and crop rotation all the way down to producing and preserving your own liquid nutrients from localy harvested and sustainable resources.... there are THOUSANDS of roads to take with organic gardening, but the truth of it is you will have to do ALOT of research and dedicate alot of time especially if you are starting from scratch.
EDTA (Ethylenediaminetetraacetic acid) is a Synthetic chelation agent (It turns stuff into preserved jelly) and it is in Most synthetic fertalizers. check the ingredients in the fertalizers for EDTA, if they have it do not buy that fertalizer.... and if the ingredients are not listed then the company is not worth bothering with. if you cant call them and ask exactly whats in it then they are hiding something.