01

March

2008

Technical properties of coir

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Properties of coir

pH: 5.4 – 6.8. Perfect for use as a growing medium.

Air Filled Porosity (AFP): 10 – 11%. This is great for use as a growing medium.

The Air Filled Porosity (AFP) defines the air spaces in the pot needed for good water dispersal and drainage. Porosity is also important for good healthy root growth.

Root growth: With coir you’ll find root growth is much faster than normal composts. This makes it excellent for cuttings. In some cases, freshly repotted plants may appear not to be growing for a week or so. However if you check, they are growing roots rather than tops.

Water Absorption Time: Wetting/re-wetting time is immediate.

Cation Exchange capacity: In excess of 120 meq/1000 combined with a good conductivity figure allowing holding and dispersal of nutrients.

Carbon/Nitrogen: Ratio of between 90:1 and 110:1. This, combined with coir’s lignin content, makes it a good long-term growing medium.

Nutrition: Coir contains a useful amount of available potassium, and small quantities of:

  • Nitrogen
  • Phosphorous
  • Calcium
  • Magnesium
  • Sulphur
  • Copper
  • Zinc
  • Manganese
  • Molybdenum
  • Boron
  • Iron

Where to buy our products

Please take a look at our coir products in our online shop.