Black Volcanic Lava Rock, 1/4–3/8 Inch Cascade Mountain Stone, Bonsai Soil Amendment, Cactus and Succulent Mix, Terrarium Top Dressing

Black Volcanic Lava Rock – 1/4–3/8 Inch Natural Stone

Add a bold, natural finish to your plant displays with this black Cascade Mountain volcanic lava rock. Its attractive dark color and durable mineral composition make it a versatile material for bonsai, cactus, succulent, and specialty nursery growing mixes.

This very hard, naturally occurring lava rock does not rot and is relatively lightweight. It can also be used as decorative top dressing for bonsai containers and terrariums.

Product Details

• Material: Natural Cascade Mountain volcanic lava rock

• Color: Black

• Particle size: Approximately 1/4–3/8 inch

• Texture: Very hard and durable

• Weight: Relatively lightweight

• Condition: Natural stone

The listing photos show the black lava rock both dry and wet. Its appearance may look darker when wet.

Suggested Uses

Bonsai Soil Mixes
Use as a mineral component in suitable bonsai growing media or as decorative top dressing.

Cactus and Succulent Mixes
Add lava rock to specialty cactus and succulent substrates where a mineral component is appropriate.

Specialty Nursery Soil Mixes
A natural ingredient for custom growing mixes.

Hydroponic Applications
Suitable for systems designed to use durable mineral growing media.

Terrariums and Decorative Top Dressing
The dark color creates an attractive contrast with green foliage, light-colored stones, and other decorative materials.

Available Package Sizes

Choose the quantity that best suits your project:

• 15 oz.

• 10 cups (2½ quarts)

• 5 quarts

• 3 gallons

• 6 gallons

Approximate Trade-Gallon Fill Volumes

These are the seller's stated approximate container-fill equivalents, not the labeled package volume.

Shipping Information

• 15 oz. packages: Shipped First-Class Mail.

• All other sizes: Shipped by USPS Priority Mail.

Sample Orders

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

• Samples are available for the cost of shipping.

• Samples are large enough to see the product but not enough for a project.

• If you subsequently order 6 gallons or more, the sample shipping cost will be reimbursed.

• Please let us know about your sample order when placing your qualifying larger order.

Please Note: Natural volcanic rock may vary slightly in shape, texture, and appearance. Particle sizes are approximate.