Disclaimer: This post was originally posted by Hero Member, mjb8743. This user is located in Zone 7, South NJ, Garden State. This was originally posted on January 14,
2014.
Many, many problems with using coir straight are documented here. If you must use it, be sure to add LOTS of perlite, or use it as an additive (1:2 ratio) to your regular mix. Do a search on coir to see what I mean.
Also, my own observation is that coir breaks down way sooner than peat mixes. That's not a good thing for wicking, as the already very wet media will become too-wet and bog-like.
I don't know how many boxes you have, but if you can spare one to experiment, do so... but don''t make the mistake of devoting all your boxes to any unknown, unreliable or iffy component or procedure.
Mickie