I don't see benefits from pure organics anyway and am quite opposed to peat, as its environmentally the worst medium you could choose. I only use organics as add on with mineral fertilizer in hydro nowadays and that's what I'd normally recommend.
Just wanted to point out that it works just as well, I've seen no differences at all but heard many times that it wouldn't be possible with coco.
Organic nutrients like
biobizz worked with everything I tested, from coco to straight perlite. That you need soil or at least peat mix for an active, thriving micro herd and organics is just a myth.
What specific benefits from organics together with peat do you mean and why shouldn't mycorrhizae grow in coco?
Iirc some manufacturers even claim naturally occurring mycos as a benefit of coco coir.
About perlite and coco:
It depends, if you want to grow with coco handwatered in a soil like manner pure, fine coco and relative large pots are the way to go. But I don't think 10% perlite will hurt. If you do it that way you can also use coco "humus" like from
Biobizz, it has higher cec than less decomposed coco, and add fine vermiculite, leonardite, bentonite, worm castings and the like to get a way higher cec than standard coco or peat mixes.
But if you want to use it more in a hydro like manner I prefer coarse coco like the canna CoGr slabs with lots of medium perlite and smaller pots. That way you can (or have to) irrigate more often (up to six or more times/12hr) and the growth rates are on par with most other hydro systems. I really didn't like coco pure, always had coco specific problems, but was very happy with Cogr+perlite.
