Aged Fine Fir Bark - 3/8 minus Used as a natural organic component in soil mixes... For bonsai, succulent, cactus soil mixes... mix with compost, peat, pumice, perlite, and lava. For seed starting mixes... mix with peat, perlite and fine pumice. For hanging baskets and containers...mix with peat, perlite and 3/8-1/16 pumice. We ship USPS and UPS. Each order is hand packed and bagged with a reusable tie for easy storage after you have used part of the bag. Available in 15 Oz., 10 Cups, 5 Quarts, 3, 6 and 12 Gallon volumes. 15 Ounce quantities are shipped First Class, 10 cup and 5 quart quantities are shipped Priority Mail, 3, 6 and 12 gallon are shipped UPS. - Our 10 cup box will fill 1 1/3 trade gallon containers trade gallon containers. - Our 5 Quart box will fill 2.5 trade gallon containers. - Our 3 Gallon box will fill 6 trade gallon containers. - Our 6 Gallon box will fill 12 trade gallon containers. - Our 12 Gallon box will fill 24 trade gallon containers. Each package is hand packed and bagged with a reusable tie for easy storage after you have used part of the bag. We are a commercial Wholesale / Retail Plant Nursery with over 30 years mixing specialty potting mixes. Check out our other listings of custom potting mixes to select the perfect mix for your bonsai or specialty plants.