Hi Everyone!
Think you could help me diagnose this poor guy? It's a nobile dendrobium, Love Memory 'Fizz.' First attempt with nobile. It gave me gorgeous blooms all over last winter. I didn't repot it when the new canes began, I thought since it was in coconut husk, it could go another year. Now I'm rethinking that.
Conditions:
It's been dealing with Texas sun in the morning under a 50% shadecloth. I normally water when it starts to feel lighter when I pick it up, much more frequent here in 100 degree summer weather, 2-3 times a week lately. I didn't have shade cloth until a month ago, the poor thing's been dealing with quite a bit of sun. I just have an apartment balcony, so it gets kitchen sink watering at the base only. I think my water is limestone-y and tests at about 8.5 PH. I haven't noticed any bugs, but I did spray it with some Imidocloprid in late June just to be sure (I'd bought some new orchids and they were quarantined, but in case anything flew everything got sprayed.)
Problems
It seems like the back canes are going yellow - most yellow, then hard and brown, but one (red arrow) is going mushy at the base. And when I looked more closely at the plant I noticed some of the new canes had brown spots where the new flowers would normally come in, and they don't feel mushy yet, but do feel less firm than other flower node areas.
Questions- Your thoughts?
- For the old canes, if they go yellow, should I just cut them out, or are they still useful nutrient storage?
- I thought nobiles would keep their old canes longer, do they just shed those after a couple years?
- Think this could be shedding old canes and I could just ignore it, or should I repot? I'm leery of repotting, don't know if that's going to be the final stress factor - it should be setting up for it's dry season.
- Could it be a problem with the water ph?
- If I cut out canes should I also cut out any new growth cane that has this brown spotting at the flower nodes?
Thanks for any advice you can lend!
Regards,
Kara
Nobile Dendrobium Canes
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