Screened Black Volcanic Lava Rock – 1/4" to 1/32"

Add natural texture, drainage support, and a pleasing dark color to your specialty growing mixes with Black Cascade Mountain Volcanic Lava Rock. This screened lava is suitable for bonsai soil, succulent and cactus mixes, hydroponic growing media, specialty nursery plants, terrariums, and decorative top dressing.

The lava is naturally porous, relatively lightweight, and very hard. Its particles are irregular in shape and size, so measurements are approximate.

Product Features

• Natural black Cascade Mountain volcanic lava rock

• Screened size range: approximately 1/4" to 1/32"

• Most particles are approximately 1/4", with some smaller particles down to 1/32"

• Neutral pH

• Porous, relatively lightweight, and very hard

• Does not rot

• Suitable for bonsai, succulents, cactus, hydroponics, specialty nursery soil mixes, and terrarium top dressing

• Natural material with a pleasing black color

How We Screen Our Lava

Our lava arrives from the mine as 3/8-inch-minus material. We rescreen it to remove material larger than 1/4 inch.

Because lava particles are irregular, our size descriptions refer to the screening process rather than a uniform particle measurement. Natural variation in shape and size is expected.

Available Sizes

Choose from sample size, 15 ounces, 10 cups, 5 quarts, 3 gallons, 6 gallons, 12 gallons, 18 gallons, or 24 gallons.

Approximate container fill conversions:

• 10 cups fills approximately 1.33 trade-gallon containers

• 5 quarts fills approximately 2.5 trade-gallon containers

• 3 gallons fills approximately 6 trade-gallon containers

• 6 gallons fills approximately 12 trade-gallon containers

• 12 gallons (2 boxes) fills approximately 24 trade-gallon containers

• 18 gallons (3 boxes) fills approximately 36 trade-gallon containers

• 24 gallons (4 boxes) fills approximately 48 trade-gallon containers

Shipping Information

• Samples are shipped USPS Ground Advantage.

• 15-ounce, 10-cup, 5-quart, and 3-gallon sizes ship USPS Ground Advantage.

• 6-, 12-, 18-, and 24-gallon orders ship Priority Mail or UPS.

• Free shipping is available to most locations.

• Alaska, Hawaii, APO addresses, U.S. territories, and locations considered remote may require a freight surcharge.

Want to See the Material Before Ordering?

Samples are available for the cost of shipping. They are intended to show the appearance and general particle size, not to provide enough material for a project.

If you place an order of 6 gallons or more after purchasing samples, the sample shipping cost will be reimbursed. Leave a message in the Special Instructions to Seller at checkout with your sample order information so we can refund the sample shipping cost.

Natural Material and Handling Notes

Lava is a natural material that gradually breaks down. Some fines may develop during shipping. Material from different areas of the mine can vary slightly in color, particle size, and appearance.

The first product photo shows the lava dry; the second shows it wet.

Lava is hand-packed in a bag with a reusable tie for convenient storage. If the material dries before use, moisten it to help prevent dust from forming. Avoid inhaling dust from rock or potting soil products, as it may irritate the lungs, especially for people with sensitive respiratory systems.