I was long searching on this topic, but now I found a brief description on Freshplaza about this new potting media.
Coconut fibre is made during the harvest and production of coconut products, mainly coconut oils. The outer shell particles are used to made this media.

I paced the freshplaza article in a PDF, which you can find here.

From my experience: I share the informations in the document, because the coconut fibre substratum is high porous, very good draining, high aerated and is well suited for any citrus plant.

The stuff is still annoyingly difficult to find around my part of Florida, but I've been using coconut husk chips and ground coir for about four years now ever since Millet turned me on to it. It works very well for container trees.

The article seems to be showing the use of pure ground coir for growing the trees in, but in my experience the milled coconut coir lays rather wet. I prefer to mix it with husk chips cut into about one half-inch pieces somewhere in a 1 part milled coir to 4 parts husk chip ratio. Maybe they are using it differently than in my experiments.

I've tried the coconut media both with chips that are only rinsed and with chips that were rinsed then had a cation exchange done to remove the last of the clinging sodium. The growth performance differences weren't all that great, but enough of one that I take the trouble to do the cation exchange now that I've foiund a local source for the calcium nitrate.

The two things that I like most about the coconut media that it is nearly mpossible to overwater the tree so I don't have to worry about heavy rainfall in our wet season and that it lasts longer before needing to be replaced than any other media I've yet tried.

I had meant to do it last January and never did so I have just now gotten around to experimenting with a coconut/fired clay media to see how well it will do. One of the threads that discusses it is here:

link

I just repotted a dozen trees about ten days ago using four parts coconut husk chips, one part milled coir, and one part of the oil-dri mentioned in the above link. If they do well I'll increase the percentage of the oil dry and decrease the coconut in the next round. We'll see how it goes.

.....Alan.

Most of my container trees are planted in a medium of 4 parts Coconut Husk Chips (CHC) and 1 part peat moss. I also have trees planted in 100 percent CHC, using a 50:50 blended mix of 1/2" CHC and 1/4" CHC. - Millet (1,106-)