Den. unicum - just arrived - leaves yellowing/spots

[Roberta]

Looking at that plant, I'd repot it - it has a nice new growth. Also, as it matures, the canes tend to become pendant. So you may want to choose a pot that is wider than it is tall.

Just for grins, here's mine, so you know what to look forward to. It's mounted, lives outside (so gets pretty cold, 40F/4 deg C nights lately) The bare plant that I'm holding is what it looks like right now, typical January. (It may look dead or dying, but definitely isn't) Other pictures show what it looked like last May/June, and I expect will do the same this year.

And Den hekousense... here it is today (typical January) , and the same plant at the beginning of last September. Normal bloom time is August/September