Coco fiber in itself is a soft and loose substrate and is not likely to support tall growing, heavy-leaved plants. Packed down well it will hold water too much underneath that you wont notice since the top looks dry.

The only plants I've grown spectacularly in pure coco fiber are some epiphytic bromeliads, epiphytic cactuses and even Nepenthes pitcher plants since they are technically independent of the nutrient derived from a soil medium