The ideal potting mix for all orchids including Cattleyas, Phalaenopsis, Dendrobiums Epiphytic orchids and bromeliads. This orchid potting medium is made with pine bark, perlite, and horticultural charcoal to promote healthy growth and allow for proper root ventilation. Repot your orchid to maintain aeration and avoid suffocation. This should be done once a year. Plants require regular re-potting with fresh growing mix for optimum growth.