Perlite sand is extremely fine. Is it clay? Will it cake up my soil over a long period of time(e.g.10 years)?

  • 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, 2021 at 18:45
  • Clay is not composed of simply very fine particles. Sep 27, 2021 at 0:47

1 Answer 1


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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