Actually, they are for orchids, lol... And they are great for them decoratively and for stabilization, and Also for air flow. We just don't generally pot orchids directly in decorative pots. If you do, I've noticed the medium doesn't dry out evenly which causes problems, and some orchids attach to the sides, even the glazed, and/or get so tight inside with all the roots that you end up having to break the decorative weight holding pot just to get it out. I hope that explains their use a bit better. We like to use unglazed porous clay or plastic as pot choices, then slip those pots inside something more decorative for showing.
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