How can I make my own medium using coco coir?

[Sixpackdad]

I buy roots organics original potting soil, which is amended coco & perlite soil.

There is also a recipe posted by @garrigan62

Soil mixture ratio?

idk about adding the vermiculite to the coco, have not ever seen it done, i think it would be just fine tho, its been in every peat mix i have used, that being said, i also think… your 70/20/10 ratio looks great.!! if that is what i had it would be put to use in that ratio.! i m currently using 70% coco with 30% perlite, works great.!

If you go plain, I have seen some people go 50/50 perlite and coco.