Peat is finite, slow to form and increasingly restricted. Coir behaves differently in ways worth understanding before you switch a whole crop over.
Peat bogs take thousands of years to form and a season to strip. As European restrictions tighten, growers who have used peat for decades are being asked to find something else — and coir pith is usually the first candidate. It is a genuine replacement, but it is not a drop-in one, and the differences are worth knowing before you commit a season to it.
Water behaves differently
Coir holds a lot of water and it rewets easily. Peat, once it dries past a certain point, becomes hydrophobic and fights you when you try to bring it back. Coir does not do this. The practical consequence is that growers moving from peat to coir often overwater for the first few weeks, because the surface looks dry while the material below is still holding plenty.
The salt question
Coconut husk grows in coastal soil, so raw pith carries sodium, potassium and chloride. This is the single most common reason a coir trial goes badly. Washing rinses that salt out, and electrical conductivity (EC) is how you measure what is left. Our Low-EC Cocopeat is thoroughly washed to 0.5 mS/cm or below; our High-EC Cocopeat measures 3.0–5.0 mS/cm.
If your crop is sensitive to salt, ask for Low-EC Cocopeat. Choosing the right product up front costs far less than finding out the hard way.
Feeding needs adjusting
Coir has a cation exchange capacity that initially locks up calcium and magnesium. Most growers compensate with a slightly higher Ca/Mg ratio in the feed for the first weeks. It settles down; it just needs anticipating rather than diagnosing later.
What you gain
- Better air-filled porosity, so roots get oxygen even in a wet pot
- Rewets reliably, with no hydrophobic sulk after drying out
- A renewable by-product of a crop already being harvested for other reasons
- Compresses for shipping, so a container carries far more usable medium
Coir is not simply peat with a better story attached. It is a different medium that happens to fill the same role, and it repays a little attention during the changeover.