Hi Paulberry,
Sorry no-one seems to be able to help. Just giving your post a little bump in case that helps someone else see it. I'm afraid I would have no idea where to start research of these questions, however I would say that question 2 will depend on whether you are talking about the mass market Phals or all phals. There are some tiny tiny phalaenopsis species and they will never be put in the size pots you get the larger ones in, but equally you will only find them for sale by specialists, not in florists or supermarkets or garden centers etc.
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