Some coco peat is not completely decomposed when it comes and will burn up readily available nitrogen because it does so (often known as drawdown), competing with the plant when there is not more than enough. This known as nitrogen robbery; it could cause nitrogen deficiency during the plants. Cite https://entrancemats79901.elbloglibre.com/37968239/the-smart-trick-of-coir-mat-cut-to-size-that-no-one-is-discussing