Our 1/4+" pumice is ideal those wanting a clean hand screened pumice for bonsai soil, soil mix's or to improve the drainage of water sensitive plants. Particle size is from 1/4 inch to less than 3/8 inch. 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 that allow roots access to oxygen, nutrients and water. Pumice improves both water retention and drainage of your soil mix.