well here's the extension of that thought from earlier today. if you could design a medium that would support optimum water uptake, without making the roots prone to edema, ie at the maximum tolerated rate of absorption, then that would in turn lead to better growth, right?
but, since water uptake rates appear to vary across genera, I would think this would be kinda hard to do, and thus I see this as one of hte potential limitations of current orchid culture techniques.
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