A month ago I bought an orchid for a friend of mine. I got it from Lowe's in good shape and repotted it into Better-Gro mix (bark, charcoal, perlite) in a clear pot with holes, then put that into a decorative pot also with holes. I told her to water when dry by running water into the clear pot at the sink.
Now I'm plant sitting for the friend, and the poor orchid's leaves are striated and floppy. According to my friend (who is much better with plants than me, but hasn't had orchids before), she waters as I described twice a week, which is about what I do for my phals potted in the same way. I poked around and the roots still look fine (not amazing, but they green up when watered).
Is this likely to just be underwatering? I'm surprised that it could take effect so quickly and dramatically, and also that the plant still has most of its blooms. I know "fusarium" gets thrown around a lot, but I admit I'm a little worried.
For now I'm keeping the plant away from my collection and I gave it water and some KelpMax, since I figure if it's dehydrated a few new roots wouldn't hurt.