Perlite sand is extremely fine. Is it clay? Will it cake up my soil over a long period of time(e.g.10 years)?
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I am familiar with perlite but not perlite sand, can you add a picture with something to show the size of the particles? – kevinskio Sep 26 '21 at 18:45
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Clay is not composed of simply very fine particles. – blacksmith37 Sep 27 '21 at 00:47
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If you mean perlite, no, it's not clay and doesn't turn into clay, it is made from expanded volcanic glass, see here https://www.gardenersworld.com/how-to/grow-plants/what-is-perlite/
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