Sun Bulb Better-Gro Phalaenopsis Mix is precisely blended to possess the correct mixture of moisture essential to stimulating exceptional Phalaenopsis root and plant growth. Better-Gro Phalaenopsis Mix is an incredible rich combo of chunk Canadian peat mixed with hardwood charcoal, coarse perlite and western fir bark. This specifically formulated potting media nurtures colorful and spectacular long-living Phalaenopsis orchids. Gives Phalaenopsis orchids the air flow, root ventilation and drainage that they would thrive in a natural environment. To support healthy growth, this product should be used as needed or every 12-18 months at least and when re-potting orchids. Resealable bag contains detailed guided instructions with photos.