Custom Blended Mix by Orchid Supply Store is hand made when your order is placed. Made from the finest ingredients available & are perfect for the plants in your collection. 100% New Zealand Large Orchiata Bark Orchid Supply Store uses Besgrow Orchiata, which is a standalone orchid growing substrate that can be used directly from the bag. Produced from 100% pure New Zealand Pinus radiata bark, it is a unique, stable substrate for potting & re-potting orchids. Orchiata is a sustainable orchid growing substrate produced from the finest quality, 100% pure New Zealand Pinus radiata bark. Orchid Supply Store Custom Blend Orchiata Bark Large