Dendrobium Nobile does not grow

[Nd200]

I kept a pie e of dendrobium nobile alive, and cut off a bulb that had developed new roots. But there is no progress in growing.
I kept it indoors on a south facing window sill but shaded.
Potted in small bark pieces.

Shoukd I water it more or cover in plastic to keep humid?

[Roberta]

First, Welcome!

When dormant, these don't want much water. Summer should be the growing season, but it may not have had the strength. Let it be lightly moist but not wet, maybe next spring you'll get some action.