SCORIA: Lightweight Form of Basalt

Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 8 years ago.

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Has a porous structure which holds both air and water in balanced proportions; can be used alone for some species, with fertilizer; with fine materials it may waterlog; holds nutrients in an available form; has a pH of 7.0 to 10, varying with the source of the rock; abrasive. AU79-53
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SCORIA: Definition Lava rock, or pumice or basalt, etc. RMH 0

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