Dendrobium phalaenopsis is struggling!

[AKorchidlover]

I received a dendrobium phalaenopsis as a rescue gift. It’s a noid plant, but I’ve been told it had bright pink flowers. When I received it, had (from left to right) 2 tall canes with leaves, 2 tall canes without leaves, a shriveled cane with a giant shriveled keiki, a shorter cane that was dark brown and shriveled, a short green cane attached to two very small mini canes. Whew!

The dark brown cane looked like it was rotten or infected, so I cut the plant into 3 parts...the 4 tall canes, the keiki, and the smaller cane with the two very, very small growths. The keiki plumped up and has produced an additional 2 smaller but good looking canes with nice roots. The small cane and mini canes have pushed out two additional canes, both smallish but nice looking and green. I’m super pleased with these!

What I can’t figure out is the 4 larger canes. They are driving me crazy. They pushed out some new roots and started a new cane last fall, but the growth got only about an inch long and then turned black and hard. This year, again it added new roots and a started a new growth off of the last aborted growth. But it’s stalled, again! It hasn’t turned black, but it stopped growing.

Any ideas what I am doing wrong? I’m hesitant to repot, but maybe? It’s in bark, a moderately humid area, and gets alaskan summer sun a number of hours a day.

I’d love to see this little one start thriving!