2 Quarts Maroon 1/4 inch Bonsai Lava Rock


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 Quart, Gallon, 2 Gallon and 3.5 Gallon bags.

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.


SKU: 799600829554 Categories: ,

Additional information

Weight 4 lbs
Dimensions 6 x 8 x 4 in

Maroon aka Red. NOTES: Bright red lava no longer exists. Some bags of bright red lava can be found at big box stores. These bags often contain brown lava rock that has been dyed. This Dye may affect your plants and wildlife. This can be verified by washing a bag in your drive and checking for red concrete stains. You hear stories of people installing red lava that mysteriously turns brown after one season because the dye rinses away over time. All of our products are natural and have not been dyed. We crush our own lava. This is the true test of color. If the inside and outside colors match we know its natural.

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



Cubic Inches


Cubic Feet



2 Quart Bag


9.22 … 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

.394 ounces per cubic inch


  1. Kara

    I’ve been looking to use a top dressing on my succulents other than pebbles or rocks– I like that Monto Clay shows when it is dry. Does lava rock (red or black) have the same effect? What about bonsai block? Thanks!

    • Wayne

      I have used both the red AND the black lava as top dressing (to very attractive effect) quite successfully. I HIGHLY reccommend these products from BonsaiJack

    • Bonsai Jack

      Hello Kara. The top layer of soil will always be dry. You want to monitor what is happening just beneath the top layer. Black lava and maroon lava will be darker when wet. I hope this makes sense.

      Have a great weekend.

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