keeping phals outside

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Hello

I want to put my phals outside, but I am wondering how people don't get crown rot when it rains. I have mine in pots, not mounted, so the water wouldn't drain out. Some of mine naturally drain the water out of the crown, but in other, I need to tip it out. What do you do? I don't like keeping mine inside because of the airconditioning , and I want the temperature change from day to night

Thanks!!