Dendrobium Sa-Nook with crumpled leaves and drop leaves

[Vespucci8]

Hi all,

I have a dendrobium that has finished flowering. I may have made a mistake by repotting these after flowering, while it's winter. After that, almost all leaves became crumpled with strange spots and then fell of. It is wintery here at the moment, with snow and little daylight.

Indoor temperature is 66 Fahrenheit (19 C) and humidity is 50%.

Can someone tell me if this dendrobium can still be saved? Are there new pseudobulbs growing in the spring? And how many times should I water it? When the potting medium is becoming dry?

Best!

[SouthPark]

The remaining leaves still look in very good shape. Has the plant stabilised? No more leaves drying up and falling off?

[Vespucci8]

The top leaf became like this about a week ago... Hopefully, it will stabilize. What would you recommend regarding watering?

[Orchidtinkerer]

The Sa-nook dendrobiums are warm growing.
They do produce new canes and yours looks in good enough shape to be able to do so but I need to keep mine very warm.
It has gone down to 16 degrees occasionally but mostly I try to keep it above 20 degrees at all times

[SouthPark]

Also take a look at your media. Your new potting media, which appears to be bark.

It is well known that very dry bark (or just dry bark) ----- can have a water-repelling feature --- where watering of dry bark can just have water just flow right off the surface of the bark without getting into the bark at all.

So orchids can die of dehydration if dry bark is not at least pre-primed (soaked) in water for a long enough time prior to potting of the bark. So check the bark in the pot - to see if it is too dry.

But also be careful of making bark too soggy for long periods of time ------ which can drown regular roots. And if roots don't survive - by being too dry for long periods of time, or being too wet for long periods of time ------ then leaves could start dropping, or yellowing could occur.

This doesn't mean those effects were occurring. But just for consideration. Other considerations can be temperature. You mention a particular temperature ---- or range, but just got to make sure that the temperatures really do stay within the suitable growing range all the time - without venturing out into unsatisfactory regions.

And also air-flow and humidity considerations ----- such as whether fungal attack occurred or not.

And light levels too.

[Roberta]

Loss of that leaf won't be a problem... the other leaves look good. The ideal time to repot an orchid is when new growth - and new roots - are just getting started. You are a bit ahead of the ideal time - these likely will produce new growth in the spring, which is not far away. As Orchidtinkerer notes, your temperatures are a bit cool for this type of Dendrobium. Until things warm up it probably won't do much, but should survive OK. Do keep it watered - this type of Dendrobium does not want a dry rest period in winter.

[estación seca]

Maybe the leaf was too close to the cold window. It looks like cold damage to me.

[SouthPark]

Originally Posted by Vespucci8

almost all leaves became crumpled with strange spots and then fell of.

The photos don't seem to provide a clear indication of how many leaves fell off. Almost all leaves fell off suggests that the stalks had quite a lot of leaves before. But this can't be seen in the photograph. But hopefully the condition has stabilised - and no more leaves are falling off.