Black Lava Rocks Black Lava Rocks is used as a soil additive that can also be used as a growing medium. Irregular pores in stone absorb moisture Improves aeration and drainage while maintaining moisture Lightens potting mix to provide air to plant roots 6-12mm Each packet is approximately 1L (500 grams)
The actual product may differ as each product has it's own unique natural look and though look identical but are never 100% similar to the image pictured here.
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