Nights are typically cooler, which is more favorable to fungal growth.

If your plants are THAT dry after a day, then you're not watering well
enough and/or your environment is too dry. Misting the roots alone does not
add all that much of a fungal threat. It's the crown I was concerned about.

--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Books, Artwork, and Lots of Free Info!
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"Xi Wang" wrote in message
news:GMH4d.502911$gE.30543@pd7tw3no...
Hi,

Thanks for your comments Ray. I know it's not great to mist the roots in
the evening, and they say you should do it in the morning, but sometimes
if the aerial roots have been dry all day then I just can't help it. What
is the reasoning behind the whole 'mist in the morning' maxim? I mean, I
see no reason why fungi would be more likely to strike at night than
during the day.

Cheers,
Xi

Ray wrote:
Oh, yeah, one more thing: the sentence that has the words "night" and
"misting" is not so good a sign. Leaving a plant damp in the evening is
not a good idea, as that's a perfect invitation for rot.