Methods and key points for making charcoal from coconut shells

Large pieces of charcoal have the effect of comprehensively acidifying, and can also absorb water and stabilize moisture return; orchid roots like to attach to it. Large chunks can be used as a drainage layer at the bottom of the pot, and broken pieces can be mixed into potting media. Coconut shells come in three grades - coarse, medium, and fine - suitable for large, medium, and small seedlings as well as flask seedlings; they provide good water retention, drainage, and aeration, and can be used alone or mixed with other potting media. (Xue Congxian)