You're going to want a nutrient made for coco coir because it has unusual interactions with potassium and calcium. It is NOT an inert medium like perlite or pre-treated hydroton.
It also contains no nutes except potassium, and even that is not necessarily a good thing because crappy brands of coir leach salts out.
stinkyattic Reviewed by stinkyattic on . Coir and nutes I bought some coir and expanded it using pre-treated water. I used the recommended dose for seedlings on the Liquid Karm bottle. It's like 5mL per 4L. I think that's like 1lq. oz per gallon... If I got that wrong, sorry, I'm Canadian lol Soooo should I be adding anything to my coir or just let my plants grow out as if it were in soil? Rating: 5