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Paphiopedilums seedlings rooting in Plant Culture Containers with Adhesive Microfiltration Discs. The use of vented vessels or vented flasks ensures better growth rates and superior plants. Here the PCC's contain 25 seedlings each, which can be seen to be growing well and starting to fill their allocated space and root into the charcoal media.
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paphiopedilums rooting  in  PCC