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

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  • Regular price $13.95

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 quantities are shipped First Class, 10 cup and 5 quart quantities are shipped Priority Mail, 3 and 6 gallon are shipped UPS.

- Our 10 cup box will fill 1.33 trade gallon containers with pure pumice. 
- Our 5 Quart box will fill 2.5 trade gallon containers with pure pumice.
- Our 3 Gallon box will fill 6 trade gallon containers with pure pumice.
- Our 6 Gallon box will fill 12 trade gallon containers with pure pumice.

 Mix in 15% pumice into a soil mix for general horticultural use including Japanese maples, raised beds and containers.
 For Gunnera, Giant Sequoia, Sophora, Daphne, Monkey Puzzle  trees, Franklin trees and other plants that are water sensitive use 30% of pumice to mix. 

 For cactus and succulents add 60 - 80% of pumice to 20 - 40% organic matter. 

 For Bonsai soil mix use equal parts pumice, course compost, bark and black lava or course sand.

All prices include shipping.