Why won't my Oncidium ornithorhynchum grow?

[wintergirl]

From your new pictures the roots look okay. The picture's not the greatest. You can remove the old potting mix, you might have to use tweezers for some. There might be rotting in the center. Then repot.

[GeorgeAdams]

Good news! My Onc. has began to grow a new pseudo bulb (a bit late though).

[snowflake311]

Originally Posted by GeorgeAdams

Good news! My Onc. has began to grow a new pseudo bulb (a bit late though).

Woohoo that is awesome news! I don't give up on orchids I like. The wrinkled bulbs often mean they are old not much more on most hybrids.

New growth is a step in the right direction. You are doing something right keep it up!

[ThePinkCucumber]

Some orchids do love to drive us nuts by taking their time!

[estación seca]

Several ways to remove old potting mix from root balls like this:

1 Swish the root ball rapidly and forcefully back and forth in a bucket full of water. Start with oscillations of about 3"-4" and increase. Stop every half minute and remove loosened potting mix. The last few chunks of mix you will probably need to remove with your fingers. Old, dead roots often fall off with this treatment.

2 Spray a forceful stream of water on the root ball with a garden hose, kitchen sink tap or bathroom hose shower. Take care soil does not go down your drain. This also removes some dead roots.

3 Soak the root ball thoroughly, then pick out old potting mix with your hands and a long tweezers.