The Orchid Doctor Articles under the Heading Limestone

Limestone Comments
LIMESTONE: Added to Potting Mix For a mix of fir bark and redwood bark add 1/2 pound of pulverized high magnesium limestone to each cubic foot. A64-591; A75-437; this procedure not considered necessary, as the pH of the fir bark changes with aging. A59-496 0
LIMESTONE: For Paphiopedilums In nature warm rain does not dissolve the limestone substrate where Brachypetalum types grow; in greenhouses cold water dissolves an excess of the liberal supply sometimes erroneously added to the mix and it harms the plants. A77-143 0

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  1. Sandi Block-Brezner asked question Brassocattleya hybrid? in category General Discussion
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  1. Robert H. Findlay commented on topic "Parentage of RLC Memoria Emma Chen" by Dean Haas
  2. John Small commented on member plant B. nodosa ''H&R' 4N x 'Mas Mejor'' by John Small
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  4. Dean Haas commented on article "Have Local Orchids to Sell or Trade?" by Sys Admin
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  8. Sharie Heckaman commented on topic "Paph. tag Identification" by William Gorski
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