Coir is the fibrous material found between the hard, internal shell and the outer coat of a coconut. The individual fibre cells are narrow and hollow, with thick walls made of cellulose. The two varieties of coir are brown and white. Brown coir harvested from fully ripened coconuts is thick, strong and has high abrasion resistance. Mature brown coir fibres contain more lignin and less cellulose than fibres such as flax and cotton, so are stronger but less flexible. White coir fibres harvested from coconuts before they are ripe are white or light brown in colour and are smoother and finer, but also weaker.
The coir fibre is relatively waterproof, and is one of the few natural fibres resistant to damage by saltwater. Fresh water is used to process brown coir, while seawater and fresh water are both used in the production of white coir.
COCO PEAT
Coco peat (coco peat), also known as coir pith. coir fibre pith, coir dust, or simply coir, is made from coconut husks, which are by products of other industries that use coconuts. Coir waste from coir fibre industries is washed, heat-treated, screened and graded before being processed into coco peat products of various granularity and denseness, which are then used for horticultural and agricultural applications and as industrial absorbent.
COIR TIPS
The long strands of coir used to make liners are exceptionally durable and sterile, so they don't spread disease to your basket plants and they break down slowly. Unlike moss liners, which can be acidic, coir is pH neutral, so it works with most common container plants. However, the frequent watering necessary in a coir-lined basket does cause nutrients to leech out of the soil quickly. Applying a soluble fertilizer every two weeks during the growing season replenishes these lost nutrients.