I believe its around 6-7ph just like promix...

I have never been too too succesful with Coco though So somone will hopfully let you know a 100% what it should be... I should know but im not 100%

kd
kdspecial Reviewed by kdspecial on . Question: pH & coco coir I'm going to do a grow in coco coir and I was getting ready to flush the coir and get it pH'd properly. I intended to use pH7.0 water, but some of the things I have read here today are saying the pH for the coir should be 5.7. Can someone who has grown in coir please tell me what the proper pH should be? Thank you!!!! Rating: 5