"A popular recipe for an orchid potting mix is about 60-70% bark, 10% perlite, and 20-30% coir," says Justin. An organic pine bark from Walmart would work well as the base in an orchid mix recipe.

use orchid bark (available at Perfect Plants Nursery) to make up 50% of your DIY potting mix. This is designed to provide ...

and choose the substrate mix based on how readily it retains water. Commonly used ingredients include peat moss or coco coir “peat,” fine-grade orchid bark (fir or pine), fine clay pellets ...