oncidium question about yellow leaves

[tucker85]

First of all it's definately not a dumb question. Occasionally older leaves on oncidiums will turn yellow and fall off. On the other hand the leaves on yours do not look all that old. Oncidiums need a little more moisture than some of the other orchids with psuedobulbs. They also prefer good humidity and air movement. I would water a little more often and see if that helps. The next time you pot an oncidium you may want to use I finer mix that will retain a little more moisture because oncidiums have fine roots. They do need good drainage and they need to dry out between waterings. I moved mine from hydroton into a mix that is mostly coconut husk chips in a platic pot with good drainage. They seem to do better that way. Of course everyone grows differently so try to find what works for you. Good luck.

[silken]

Originally Posted by tucker85

Oncidiums need a little more moisture than some of the other orchids with psuedobulbs. They also prefer good humidity and air movement. I would water a little more often and see if that helps. The next time you pot an oncidium you may want to use I finer mix that will retain a little more moisture because oncidiums have fine roots.

I too thought the bark was quite a bit chunkier than what I pot mine in. But since the roots were fine and PB's quite plump, I figured it must be OK with your conditions. I agree, I would use something finer next time.