Help! Holc wangii dying!

[King_of_orchid_growing:)]

Ok...

That's 70 F - 75 F during the day, right? What about night? Does it drop below 50 F?

If it drops below 50 F at any given point during the year, growing outdoors all year round is not an ideal solution.

The humidity is adequate.

I've never grown one potted, but that doesn't mean they can't be grown potted.

Although, I will say that a 2.5" pot is rather large for plants with such seemingly small root systems. If it were me, I'd have grown both seedlings in a 2" pot and maybe put a few small pieces of styrofoam in there for good measure.

The large grade bark is fine. I would've opted for medium grade. But it isn't an issue.

Holcoglossums shouldn't be grown under direct sunlight. They should be grown much, much shadier than this. They like moderate indirect lighting. If you're able to grow an Onc in that area, you're able to grow Holcoglossums too under the same intensity of light.

So bears the question...

What is the seedling in right now? What's in that bowl? It looks like agar. Am I right or am I wrong?