Coir trees are able to grow naturally in areas with high salinity. The salts that are not used by the plant are stored in the coir. The salts stored consist primarily of sodium, potassium and chloride. In unwashed coir, the material does not go through any treatment and the E.C. of the material may rise to 6 mS/cm or higher (measured in a 1: 1½ volume extract). Without treatment, this material is unsuitable for plant cultivation.