Most of the time, coco coir and coco peat are the same thing: the fine, spongy material from a coconut husk, sold as a growing medium. Strictly, "coir" is the name for everything that comes out of the husk, fibre included, and "coco peat" (or coir pith) is the fine fraction left after the long fibres are pulled out. So every bag of coco peat is coir, but not every coir product is coco peat.
That's the whole answer. The rest of this page explains why the labels get muddled and how to order so you get the fraction you actually want.
Where the words come from
A coconut husk is mostly two things. Long, stiff fibres run through it, and between them sits a cork-like, spongy material that holds the fibres together. When the husk is beaten or milled to extract the fibre for ropes, mats and brushes, that spongy material falls out as a brown, crumbly residue. For decades it was a waste heap outside the fibre mill.
Fibre makes up roughly a third of the husk by weight. The spongy residue is the larger share, somewhere around half to two thirds, so a mill ends up with about twice as much pith as fibre. Once growers noticed it behaved a lot like sphagnum peat in a pot, that waste got a new name, "coco peat", and a market. The older names (coir pith, coir dust) stuck around in the industry. The result is three or four names for one material, plus a family name, coir, that technically covers all of it.
The terms, side by side
| Term | What it means | Where you'll hear it |
|---|---|---|
| Coir | The whole family of husk products: fibre, pith and chips. In the UK, often shorthand for the fine growing medium itself | Everywhere. Dominant general term in the UK |
| Coco coir | Same as coir. In the US it usually means the fine growing medium, sometimes a pith-and-fibre blend | US, Canada, hydroponics shops worldwide |
| Coir fibre | The long fibres only (bristle and mattress grades). Used for mats, ropes, erosion blankets and basket liners, rarely as a growing medium on its own | Fibre trade, UK, India |
| Coir pith | The fine spongy fraction after fibre extraction. The technical and standards-body name | Research papers, Indian standards, industry |
| Coir dust | Older name for the same fine fraction | Research papers, older trade literature |
| Coco peat | Marketing name for coir pith as a growing medium | India, Sri Lanka, Middle East, much of Asia and Europe |
| Cocopeat | Same word, written as one. Common on Indian export listings | India, Sri Lanka |
| Coir peat | Same material again | Australia, New Zealand |
| Husk chips (coco chips, coco croutons) | Husk cut into cubes rather than milled. Coarse, airy, not pith | Orchid, hydroponic and berry growers |
If you take away one line from the table, make it this: pith, dust, coco peat, cocopeat and coir peat are all the same material. "Coir" and "coco coir" are the words that shift meaning.
Why product labels blur it
Three things cause the confusion.
First, the fine material is almost never 100 percent pith. Milling and sieving are never perfect, so even a "pith" block carries some short fibre. Many suppliers add short fibre or chips on purpose to open up the mix. All of it sells as "coco coir" or "coco peat" with no fraction stated.
Second, the name follows the market, not the material. An Indian mill calls the block cocopeat. The importer in the Netherlands labels it coco peat. The US hydroponics shop that buys from that importer puts "coco coir" on the shelf. One pallet, three names.
Third, some blogs have tried to invent a difference. You'll read that coir "holds more water" and peat is "more nutritious", or that one is acidic and the other neutral. There's no basis for that. Both are the same husk, and both sit close to pH 6 with very little nutrient content of their own. Any real difference you notice between two bags comes from the pith-to-fibre ratio, the particle size, the washing and the age of the material, not from the name.
What to specify when you buy
Don't order by name. Order by fraction and grade. A clear specification looks like this:
- Pith only (fine grade, sometimes sold as "low fibre" or sieved). Highest water holding. Suits seed raising, propagation plugs and blends with perlite where you want to add moisture holding.
- Pith with short fibre (medium or "mixed" grade). The standard open-field and container product. Drains a bit better than pure pith and slumps less over a season.
- Pith and chips blend, typically 70:30 or 50:50. The usual choice for grow bags and slabs where roots need air for months on end.
- Chips only, in a stated cube size. For orchids, blueberries in large containers, or as a drainage layer. See the husk chips guide for sizes and uses.
Add the form you want (compressed 5 kg block, 650 g briquette, grow bag, open-top slab, or loose) and whether you need washed material. Compressed blocks are the common bulk format, and a manufacturer can usually make a custom blend to a stated pith, fibre and chip ratio if you tell them the numbers. For what "washed" and "buffered" actually mean on a spec sheet, read buffered vs unbuffered coco peat.
How the fractions behave differently
This is the part that matters for your plants. Pure pith holds a lot of water, anywhere from six to nine times its own dry weight. Measured in a pot at container capacity, coir dust is roughly 75 to 80 percent water by volume with only around 10 to 12 percent air. That's fine for a seedling tray and too wet for a tomato that will sit in the same bag for ten months. Short fibre and chips push the balance the other way. A blend with 30 percent chips can reach air-filled porosity near 40 percent, at the cost of holding less water between irrigations. So the "same" material can be a sponge or a sieve depending on how much fibre and chip is in the bag, which is exactly why the name alone tells you so little. For the fuller picture of how pith is made and used, see what is coco peat.
If you want a quote on a specific fraction or blend, send the ratio and format you need through the contact page and we'll come back with options.
FAQ
Is coco peat the same as coco coir?
In everyday use, yes. Both usually refer to the fine, spongy fraction of coconut husk sold as a growing medium. Strictly, coir is the name for all husk products, including fibre and chips, while coco peat is only the fine fraction.
Is coir pith the same as coco peat?
Yes. Coir pith is the technical name used in research and standards. Coco peat, cocopeat, coir dust and coir peat are trade names for the same material.
Which holds more water, coco coir or coco peat?
Water holding depends on the fraction, not the name. Pure pith holds the most, around six to nine times its dry weight. Adding short fibre or chips lowers the water holding and raises the air content.
Why does my coco coir have long fibres in it?
Most products sold as coco coir are pith with some short fibre mixed in, either left over from milling or added on purpose to improve drainage. If you want pith only, ask for a fine or sieved low-fibre grade.
Is coco peat acidic like sphagnum peat?
No. Coco peat sits close to pH 6, which is mildly acidic to near neutral, while sphagnum peat is usually much more acidic. Claims that coir and coco peat differ in pH from each other have no basis, since they are the same material.
What should I write on a purchase order so I get the right product?
State the fraction (pith only, pith plus short fibre, pith plus chips with a ratio, or chips only), the chip size if any, the format (block, briquette, grow bag, slab or loose) and whether the material should be washed. The name coco peat or coco coir on its own is not enough.