My vote is for the humidity deficiency also. I'm growing several
oncidium/mtssa/etc indoors, under lights, in front of a window, inside a 6"
tray, over rocks and water and I have accordion leaves on most of them! I
can't wait to move them outside this summer!!!

Garland


"Ray" wrote in message
...
I have heard that theory and the one about the RH being too low, resulting
in the "sticking" of plant tissues as the cells below grow.


--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Artwork, Books and Lots of Free Info!


"Susan Erickson" wrote in message
...
Tony -

I think they are a symptom of poor roots. The roots can not
absorb the water needed by the plant to expand the tissue that
has developed for the leaf structure.

Check your roots and you potting mix. Sometimes for seemingly no
reason the leaves will not flatten. They will remain folded
(accordion) and the roots are good.


SuE
http://orchids.legolas.org/gallery/albums.php