I’m having wonderful results with Vital Earth’s Manna Mix. It’s comprised of a 50-50 mix of peat and coir. Enhanced with OMRI compost, and earthworm castings.
Earthworm castings are acceptable in eyes, would be better if they could be listed OMRI as well. But at least no guano’s. It’s inexpensive, organic, and going into my 7th week everything is still green.
I needed only amend with CaMg, Humboldt Bloom, soluble seaweed, and 3 drops/gl. of mineral matrix micros. 🙂