It really depends on your conditions, your medium, and what orchids you are growing that determines what types of pots are good options. I live in Ohio so the weather is unpredictable. I put the orchids outside for the summer and we can have hot/dry, hot/wet, cold/dry or cold/wet summers. Winters, when the orchids are indoors, can be overcast and very dark or sunny...one never knows. My favorite medium is red lava rock. Most are small Cattleyas but I do have a variety (many of the other orchids are mounted so no worries about pots or mediums).
Last year, I started using clear plastic pots that have many holes. I was worried about the Cattleyas (aclandiae and schilleriana, especially) but they all seem to be happy. I think, for my climate, they give the right mix of humidity and good air flow.
I have used plastic basket pots but now that I grow smaller orchids, I am using smaller lava rock and it does not stay in the basket pots. The problem with clay pots is when one has to pot up an orchid...Cattleya roots really cling to those pots. Also, you cannot enjoy seeing the roots. Solid plastic pots did not work in my conditions...there was not enough air getting to the roots and they would mold, then rot.
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I decorate in green!
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