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Quote (Darcie @ Mar. 31 2003,11:39)</td></tr><tr><td id="QUOTE">Please remember that higher pH is all relative. You can still have acid conditions at more then one level. [/QUOTE]<span id='postcolor'>
I am well aware of the trends of pH, I was a chemistry minor and I did tutor 4 different chemistry classes for 4 years
The examples you cited where flowers change colour were over an extreme pH range, from true acidic to true basic. And so, in this case I am correct in saying that a similar experiment for a plant as sensitive as D. adelae would result in the plants death
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Quote </td></tr><tr><td id="QUOTE">Also, it should be noted that Live Sphagnum lowers the pH more then peat alone does. And soil that is in use will start becoming more and more acidic over time. [/QUOTE]<span id='postcolor'>
Not quite the case. I believe peat and sphag are equal in their acidity. And over time media tends to lose acidity hence the need to repot or water with peat tea.
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Quote </td></tr><tr><td id="QUOTE">I would guess the red pygment shows up once you hit a certain threshold. But it could also be a mineral thing. Their is an easy test though, if anyone has a suspect color changer take a pice of the plant and dunk in acid or basic solutions and see how the color changes
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Considering the colour change in this hypothesis would be the result of gradual uptake "dunking" it in a basic solution would not show any change (and would probably kill the plant to boot.)
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Quote </td></tr><tr><td id="QUOTE">The only CP I know to grow in both extream acid and extream base conditions is the Northern Purple Pitcher. In acid it grows normal, but is Basic soils it turns green and is thinker and brittle.[/QUOTE]<span id='postcolor'>
D. linaris can grow in both (prefers nutral/basic) Cephalotus has been reported to take high slat concentrations. N. mirabilis is a weed and can grow most anywhere, ditto U. subulata and D. capensis. Almost all Mexi-Pings and many (if not all) North-temperate Pings enjoy neutral/basic conditioins.