Why Oncidium's Pseudobulbs Shriveling?

[AshKleigh]

Hello! I have been spending the past few days concerned about my new Oncidium. It's an Oncidium Heaven Scent 'Redolence' and is a lovely orchid! I purchased it from a vendor in person about a week ago and repotted it two days after it made it back to my house. Normally I will give the orchid a period to adjust, but I decided to go ahead and repot as the plant was very potbound and a new growth was happily coming in. After peeling carefully through all the sphagnum, I found an extensive root system with lots of healthy roots. Yay! I then put it into a slightly larger pot with fresh sphagnum. However, after a week of it being in my care, this oncidium's pseudobulbs have begun to shrivel. I checked and the roots are still the same, healthy. I'm confused as to why the oncidium is not taking up water and using water from its pseudobulbs instead. Is it normal for an orchid to experience transplant shock when its potted in the same medium? I'm not too worried as it still has its roots.


I wish I had a before picture but unfortunately I didn't take one of the orchid when I first got it. What does everyone think?