Coir or coco peat is a fibrous material found between the hard shell and the outer coat of the coconut.
And depending on the uses whether it used for upholstery or Horticulture – the brown fibre from the ripe shell of coconut to the white fibre of the unripe shell – for brushes ect. Comes into two shape & forms
Lets deal with the Horticultural and Environmental side of coir . As we are looking into it the alternatives of Peat.
From what I managed to source about coir fibre products is that they come in very shape and forms for example Coir logs Coir Blankets for environmental problems like landslides to biodegradable coir pots.
Lets start with the ones we know about first :-
As I mentioned before the other alternative to peat which the RHS is pushing is the use of Coco peat compost . Made out of brown coir fibre found ” between the hard shell and the outer coat of the coconut.”
here are a few disadvantages that I know by experience as horticulturist that because all coir fibre products
Other Coconut Coir fibre products are ;-
From My experience in working in my clients greenhouse is that :-
This can be counter measured if the coir is treated before hand
These are used as another alternative to mulching around young plants especially Tomatoes where it avoid splash back from the soil where the pathogens live and gives the plant a chance to grow .
Made from woven coir fibre in a circular form these can be used in conjunction of these biodegradable coir pots
The only disadvantages is that you still have to clear the leaf litter from it for it to have an effect an example of Cocopeat Ring mats can be seen below

There are two Erosion products that I know off :-
Coir logs, silt checks, dewatering bags and silt fencing. This combination of both synthetic and natural fiber materials helps to address runoff requirements around construction sites, storm drains, streams and inlets
Coir logs are biodegradable coconut coir pith measuring 1 – 6 metres in length and 10 – 0 60 Metres in length These are tightly packed in a tubular coir fibre netting made from coir twine
It’s a very efficient way of reducing water velocity at the base of slopes ,shoreline & stream banks.
Coir Blankets are a biodegradable product designed for long-term erosion control in steep areas and demanding areas . Products are made from several all-natural materials to create erosion control that is effective and biodegradable .
https://spencerrichard01.wordpress.com/tag/coco-peat/