Black Gold® Perlite 8 qt Sale! from $7.99 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. A natural mineral used to improve the drainage and aeration of any growing mix Comprised of the finest expanded volcanic rock for horticultural use Ideal to lighten soil mixes OMRI Listed® Perfect for: Potting Mix Component Seeds or Cuttings Ingredients: Perlite SKU: BGP8