3/8" - 1/16" Horticultural Grade Pumice For Soil Mix, Bonsai & Cactus

3/8" - 1/16" Horticultural Grade Pumice, with fines, For Soil Mix, Bonsai & Cactus Our 3/8" - 1/16" pumice is ideal for soil mix's. Contains a blend of sizes from 3/8" to 1/16" and some fines. Our pumice is a natural volcanic product mined in the Southern Cascades Mountains of Oregon.  You get only clean pumice... no rocks, roots or other debris.     Known as the "rock that floats", pumice has many tiny gaps or air pockets.    Our pumice is hand packed and bagged with a reusable tie for easy storage after you have used part of the bag. If your pumice dries, moisten it to keep dust from forming. Dust from any rock or potting soil product should not be inhaled and can be irritating for people with sensitive lungs. 15 Ounce,10 cup, and 5 quarts, are shipped USPS.   3 Gallon quantities are shipped USPS or UPS. 6, 12, 18 and 24 gallons are shipped UPS.      - Our 10-cup box will fill 1.33 trade gallon containers.  - Our 5 Quart box will fill 2.5 trade gallon containers. - Our 3 Gallon