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TOPZEA's 12 lb bag of mixed lava rock is a gritty volcanic gravel meant for top dressing potted plants, bonsai and succulents, and for filling vases or fairy gardens. The pieces come in mixed sizes and dark red-black tones, so it reads as a natural mulch layer rather than a uniform decorative stone. It is porous and lightweight, which suits drainage-minded growers, but the mix means uneven piece sizes and some dust. Compared with single-size pumice or horticultural grit, it gives more color and texture but less consistency for precise soil blending.
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Lowest price we've seen: $11.99 on Nov 10 at Amazon. Tracked across 2 stores since Nov 10.
Buyers of this type of mixed lava rock generally like the natural color and texture for top dressing succulents and bonsai, and note the bag goes further than expected on small pots. Complaints center on dust and inconsistent piece sizes.
