Note... this is a really old thread... it is better to start a new one, it'll get noticed more.
There is lots of debate in the orchid world about what is, and isn't, adequate to remove material that might harbor viruses in particular. Orchids are susceptible to them, they're incurable so orchid lovers are rightly a bit paranoid... That being said, I figure that if things from the dishwasher are clean enough for me, probably clean enough for my orchids - plastic pots, that don't have any apparent material sticking to them. Clay pots are another story - they're porous. To be sure of sterilizing them, putting in the oven for awhile is far more certain. Or save the new pots for the particularly precious ones. An overnight soak in a 10% bleach solution can also do the job.
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