Lava Rock - 1L
Lava Rock grains are a natural soil improver. The hard and pourous lava grains help to improve dense soil by making it airier. Diameter of the grains are 0-3 mm.
Lava Rock can also be used as a standalone substrate, ideal for cactuses and succulents, or simply used as a soil topper.
It is also able to retain nutrients from fertilizer to release them afterwards to the plant.
Sold in 1 liter ziplock bags.