Espoma® Organic Orchid Potting Mix is a premium mixture of aged pine bark, horticultural charcoal, perlite, limesTone® and yucca extract that is formulated specifically for Orchids and Bromeliads. It improves drainage and aeration which is essential to the health of Orchids. Orchids typically need to be re-potted once a year. It is time to re-pot when the plant develops yellow foliage, has lack of growth, dead or damaged roots, or begins to grow over the edge of the container. Combine Espoma® Organic Orchid Potting Mix with Espoma® Organic Orchid! Bloom Booster liquid fertilizer to keep your orchids looking their absolute best!