Red Lava Rock – 3/8" Minus, Unscreened

Natural Volcanic Rock for Bonsai, Succulents, Cactus, and Specialty Soil Mixes

Create your own custom soil blend with natural Cascade Mountain red lava rock. This unscreened material is suitable for growers who want to screen their own lava rock and select the particle sizes that best fit their projects.

Unlike our hand-screened lava products, this economical option comes directly from the quarry with a full range of sizes, from pieces up to 3/8 inch down to powder and fine particles.

Product Details

• Material: Natural volcanic red lava rock

• Maximum size: 3/8 inch

• Screening: Unscreened

• Color: Primarily red and dark gray

• Origin: Cascade Mountains

• Suggested uses: Bonsai soil, succulent mixes, cactus mixes, and specialty nursery soil blends

• Packaging: Hand-packed bags with reusable ties

Important: This listing is for unscreened lava rock. It contains mixed particle sizes and powder fines. It is intended for buyers who want to screen the material themselves.

Approximate Particle Size Composition

The unscreened material can be separated into approximately the following size ranges:

These percentages are approximate and describe the expected composition of the material.

Available Quantities

Choose from:

• 15 oz

• 10 cups

• 5 quarts

• 3 gallons

• 6 gallons

• 12 gallons

• 18 gallons

• 24 gallons

Approximate Trade-Gallon Fill Equivalents

These figures describe approximate container fill equivalents.

Samples Available

Would you like to inspect the material before ordering a larger quantity?

Samples are available for the cost of shipping. Each sample is intended to show the appearance and particle-size variation, not to provide enough material for a complete project.

If you subsequently order 6 gallons or more, the sample shipping cost will be reimbursed. Please let us know when placing your qualifying order.

Shipping Information

Shipping is included in the price.

• 15 oz, 10 cups, and 5 quarts: USPS

• 3 gallons: USPS or UPS

• 6, 12, 18, and 24 gallons: UPS

Each order is hand-packed in a bag with a reusable tie, making it easy to store any remaining material after opening.

Handling and Storage

If the lava rock dries before use, lightly moisten it to help prevent dust from forming.

Avoid inhaling dust from rock and potting-soil products. Dust may irritate people with sensitive lungs. Handle carefully and avoid creating airborne dust.

Thank you for supporting our specialty nursery soil products!