| 21. | Additional mining candidates include marble, granite, gypsum, diatomite and perlite.
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| 22. | The white stuff is likely perlite, which is expanded fragments of volcanic rock.
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| 23. | A . Perlite and vermiculite are not interchangeable.
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| 24. | The most common misconception is that perlite is a form of plastic or polystyrene.
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| 25. | Or take softwood cuttings this summer and root in equal parts peat and perlite.
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| 26. | For plants that demand fast-draining soil, increase the percentage of perlite.
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| 27. | Some people might say growing in perlite and water is hydroculture but not hydroponic.
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| 28. | Deposits of perlite and pumice on Gyali provide much of the wealth of the island.
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| 29. | Plant waterlilies in buckets of garden soil that is void of peat, perlite or vermiculite.
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| 30. | Cover the roots firmly with new potting mix ( fir bark, charcoal and perlite ).
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