Screened Pumice 1/4 Inch, Natural Volcanic Rock for Bonsai Soil, Succulent Mix and Potting Substrate, Clean Oregon Pumice, Multiple Sizes

Give your bonsai and succulent soil mixes a natural mineral component with our screened Oregon pumice. Mined in the Southern Cascades Mountains of Oregon, this lightweight volcanic material is hand-screened to create a cleaner, more consistent particle grade.

Pumice is a naturally porous volcanic rock, sometimes called the “rock that floats,” because its many tiny air pockets make it unusually lightweight. This screened grade is a useful ingredient for bonsai soil blends, succulent mixes, and other specialty growing media.

Product Details

• Product: Natural volcanic pumice

• Source: Southern Cascades Mountains, Oregon

• Screened grade: Sold as 1/4-inch pumice

• Processing: Hand-screened

• Appearance: Natural pumice with variations in color and shape

• Contents: Clean pumice without rocks, roots, or other debris

• Available quantities: 15 oz, 10 cups, 5 quarts, 3 gallons, 6 gallons, 12 gallons, 18 gallons, and 24 gallons

Screening and Particle Size

Our pumice is mined at a 3/8-inch-minus grade and then screened again to remove material larger than 1/4 inch.

The product is classified by its screening process. Natural pumice is irregular in shape, so individual pieces may vary in size. Particle measurements are approximate rather than perfectly uniform.

Please note: Pumice is a natural material, not a manufactured uniform-size product. Some variation between orders is normal.

Suggested Uses

• Bonsai soil blends

• Succulent and cactus soil mixes

• Specialty potting media

• Custom mineral growing mixes

Pumice can be incorporated into a growing medium according to the needs of your plants and your preferred soil recipe.

Natural Product and Handling Information

Pumice is a natural volcanic material that can gradually break down. Some fine particles may develop during handling and shipping.

Our pumice is hand-packed in bags with a reusable tie, making storage convenient after opening.

If the pumice becomes dry before use, lightly moisten it to help reduce dust. Avoid inhaling dust, as airborne particles from rock and potting products can irritate sensitive lungs.

Sample Orders

Want to inspect the pumice before purchasing a larger quantity?

Samples of the 1/4-inch and 3/8–1/4-inch grades are available for the cost of shipping.

If you subsequently place an order of 6 gallons or more, we will reimburse the sample shipping cost. Leave a message at checkout with your sample order details when placing your qualifying larger order.

Package Sizes and Approximate Fill Volumes

The fill estimates above are the seller's stated container-fill equivalents, not the physical volume printed on the package.

Shipping Information

• Samples: USPS Ground Advantage

• 15 oz: USPS Ground Advantage

• 10 cups, 5 quarts, and 3 gallons: USPS

• 6, 12, 18, and 24 gallons: UPS

Free shipping is included to most locations.

Orders over 6 gallons may require a freight surcharge for Alaska, Hawaii, APO addresses, U.S. territories, and remote locations.

Scenic Hill Farm is a licensed Oregon nursery. We ship to all states, subject to the shipping restrictions and surcharges above.