Phalaenopsis Orchids, unlike most orchids, prefer a slightly moist media at all times. Phals have no water storage facility, such as psuedobulbs, to retain water. Phals inhabit, in the wild, a constantly moist environment. So, In straight bark mixes, higher watering frequency is necessary to maintain constant slight moisture at their roots. Phals do not like dry roots, their motto: "I dry, I die", so their media mixture should always contain some moisture retainers, while maintaining an open, airy media, hence coconut chunks. Drains well, while retaining adequate moisture for Phalaenopsis, while reduce watering frequency.

This mixture has added charcoal and coarse perlite, which opens the mixture, so it is usable for other genera, as well.