Coarse vs Fine Perlite

Oxboy555(Las Vegas)August 23, 2013

Is "coarse" perlite considered anything above sand texture? Pinhead size? BB size?

Just wondering what the minimal acceptable perlite size is for the 5-1-1.


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greenman28 NorCal 7b/8a

Coarse is generally 1/4 inch or better.
Most Perlite is dusty crap with very little coarse particulate. I rinse my Perlite if it is inferior, and keep only the stuff over 1/16 of an inch....


    Bookmark   August 23, 2013 at 8:19PM
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edweather(Zone 5a/b Central NY)

FWIW, large bags of course perlite are usually available at hydroponic stores.

    Bookmark   August 23, 2013 at 10:18PM
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greenman28 NorCal 7b/8a

Ed, that used to be the case at the local hydro shop....they were carrying Sunshine #4 Coarse Perlite - 4 cu. ft. bags for $20 - and zero waste. The stuff was clean and beautiful. Then, the owner started buying the cheaper stuff, and that was the end of that. I made the mistake of getting the new product, not knowing that it would be half-dust. Same price, half the product....


    Bookmark   August 24, 2013 at 1:42PM
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Oxboy555(Las Vegas)

I found a hydro place selling perlite the size of small marbles. Are those usable for anything? Anybody had any luck breaking up perlite into smaller chunks?

    Bookmark   August 25, 2013 at 2:03AM
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bragu_DSM 5


good for orchid mix


    Bookmark   August 25, 2013 at 4:46AM
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I see the BB size reference quite often on GW. Does it mean 4.57 mm (0.18 inches)?

    Bookmark   October 10, 2013 at 9:27AM
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