Dendrobium w/black and yellow spots

Hello,

I have an issue with a Dendrobium NOID that I bought about one month ago. I've never owned a Dendrobium before, so I wanted to give it a go. Unfortunately, I didn't notice that it had some black and yellow spots on the leaves and in my opinion they have definitely spread during the time I've had it. It also has an odd "hole" in one of the canes and in between the canes there's some sort of webbing, but I don't know if that's just from usual spiders or if it's yet another thing that's wrong with this poor plant.

I'd love it if you could tell me something about what's wrong with it and what to do about it. I've tried to Google to see what other people have posted and I've looked at tons of pictures, but I can't really find anything that looks the same as this.

The spots are both yellow and black. The yellow spots are not very visible and they don't cover many of the leaves. The black ones however are kind of sunken into the leaf itself and they cover many of the leaves. Some only has one spot, others have more and one has a whole cluster of them. There are also some black spots on the canes and the webbing seems to be close to the potting media.

I've uploaded a bunch of pictures that I hope will help determine what the issue(s) is with this plant. Thanks for reading!

NKOrchid

 

Thanks!

Yes, I kind of figured about the potting medium. The thing is that when I bought it it was flowering. A few days ago I cut off the stem, but then noticed the new flower spike. I thought it best not to re-pot it while it's flowering/growing flower spikes. However, it could be that the medium is so dense it's best to re-pot it as fast as possible. I've had it for a month though and it seems to be doing fine. What do you think? Re-pot now or wait til it has flowered?

Do you have any clue about the spots? I think the spots and possible webbing from spider mites are the biggest issue, so I'm kind of eager to fix it, so I wont have to see this plant die.

Thanks for your advice!

 

I will definitely repot as soon as possible. I'm waiting for some medium sized bark to arrive. It should be here within the next 1 - 3 days. I'm gonna repot it in a mix of medium sized bark and a bit of leca. Does that sound ok?
Thanks for your advce!

 

Okay, I'll do that. Thanks!