This is just my opinion, however it depends on the source. I repot (if possible) all new purchases unless I can determine the roots are healthy.) If the plant comes from a source I have no previous experience with, I would first repot, then spray with Safer Soap and, possibly, Physan 20, as a preventative, then set aside for 3-4 weeks. I have limited space for quarantine, so I tend to be most discriminating prior to purchase.
Hope this helps.
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Ross
http://orchids-ross.blogspot.com/
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)
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