3/8"+ - 1/4"+ Pumice - Bonsai Soil, Succulents, Cactus & Soil Mixes - Screened
Our 3/8"+ - 1/4+" pumice is ideal those wanting a clean hand screened pumice of a larger size for soil mix's. 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.
Pumice is very non uniform in size. Thus all sizes are approximate. The Pumice comes from the mine at 3/8 inch minus.
We then rescreen. to remove pumice over ¼ inch. All pumice that does not fall through our 1/4 inch screen is considered 3/8- 1/4 inch pumice.
If you are concerned about the size of pumice you will receive and would like to order samples so you will know exactly what you will get, you can do so for the cost of shipping. Then, if you decide to order 6 gallons or more, the freight cost of shipping the samples will be reimbursed. Just leave a message in Special Instructions to Seller at checkout when you make your larger 6 gallon or larger order and we will refund for your sample shipping costs.
*Pumice is an organic material that continuously breaks down. Some fines may occur during the shipping process. Pumice from different parts of the mine is slightly different from other parts of the mine, so there will be a slight variation in size with each order.
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 before using, 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.
Samples of 1/4- 1/8 and 3/8-1/4 pumice will be shipped USPS Ground Advantage
15 Ounce,10 cup, and 5 quart, 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 1/3 trade gallon containers.
- Our 24 Gallon (4 boxes) will fill 48 trade gallon containers.
For Gunnera, Giant Sequoia, Daphne, Juniper, 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 33% pumice, 33% course compost or bark and 33% lava or very course sand.