Dendrobium antennatum with small dark brown spots?

[King_of_orchid_growing:)]

I wouldn't grow any Dendrobiums in the section Spathulata in Sphagnum moss. I'd use medium to large grade bark. They like more air to the roots.

A 2" pot is probably better than the 3" you have it in.

Grow intermediate to warm (60 F - 95 F).

Moderate to high humidity (60% - 90%).

Moderately bright indirect light.

These orchids are fairly straightforward, but they are not "bulletproof". There is a limit to how much they can bounce back.