BuildASoil Pumice Horticultural Grade: Very porous for holding air. Approximately 50% will float and 50% will sink which is ideal for soil building. Some pumice mines are also full of obsidian which is what perlite is made from and 100% will sink and not add the same air holding properties. When making potting soil, insist on horticultura
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Fast shipping, fair prices, perfect soil amendments for the type of growing i am doing. My cactus and me couldnt be more happy. Thanks for all the help!
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Luke · August 11, 2026
love it
does what pumice should. good quality. my citrus loves it
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deirdre · 12 days ago
Its Pumice
Nice full bag full of quarter inch pumice. I need a few more ingredients to finish off a nice big batch of quality living soil. I am acquiring a few ingredients at a time. I love to garden and can't wait to see, and taste the quality of the organic tomatoes this soil will produce. :)
