2 Gallons Black 1/4 inch Bonsai Lava Rock (8 Dry Quarts)


Horticultural Lava Rock

Size: ¼ Inch

Condition: Sifted, Washed, Dried and Bagged.

1/4 inch Lava Rock are used for the vast majority of fast draining soils and is our number one seller. This includes cacti and succulents. We offer Black and Maroon (red).  Available in 2 quart, 1 gallon, 2 gallon, 3 gallon, 6 gallon, 12 gallon and 24 gallon SKUs.

Lava Rock is used as a soil additive or top dressing in the art of bonsai. Mix with other ingredients such as pine bark fines, granite grit, calcined clay, and or dirt to create a succulent, cactus or bonsai soil specific to your needs.

Features include…

  • Manufactured in the US.
  • Consistent sizes, ready to use, no sifting required.
  • Pure lava rock, no fillers, no chemicals or artificial coloring.
  • Multiple bag sizes and colors to best fit your potting needs.
  • Packaging. Our aggregates are professionally packaged in custom 6 mil bags.

Did you know?
All of our soil products are state inspected and tested on a regular basis in order to comply with multi-state regulations.
This ensures you receive material free of dangerous pathogens that can damage or kill plants. This is also required to maintain six nursery stamps that allow us to ship to all 50 states.

Click the Additional Information tab for more details.


GTIN 00857206008244 SKU: 857206008244 Category:

Additional information

Weight 12 lbs
Dimensions 12 × 4 × 13 in

Jet black when wet. Black with a hint of ash when dry. Natural color. No dyes.

Raw Material

Volcanic rock.

Country of Origin(COO)

United States

Average Particle Size

1/4 Inch

Minimum Particle Size

1/8th Inch

Maximum Particle Size

3/8ths Inch


2, Dry

Cubic Inches


Cubic Feet



Two 1 Gallon Bags


9.94 … Contrary to popular belief, lava rock is not pH neutral.

Plant Type

Soil Conditioner


Dye-free. Chemical free

Other Applications

Aquarium gravel, ash trays, top dressing for plants, fire media, garden soil amendment and fire pits.

Bulk Density

.470 ounces per cubic inch