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This is a discussion on Lithophytic Paphiopedilum within the Paphiopedilum & Phragmipedium Info. forums, part of the Frequently Asked Questions category; If it's lithophytic, would it not want a high pH environment? If so, I'd stay ...
If it's lithophytic, would it not want a high pH environment? If so, I'd stay away from bark and sphagnum, and probably chc as well. Lava rock is a little alkaline, and you can also use something pH-neutral like rockwool to retain moisture.