Dendrobium anosmum and winter rest
 

I bought den anosmum 2 months ago, an adult plant with a few old leafless canes and two long, green ones from this season. I was planning to start its winter rest around next week and I already cut down on watering in the past 2 weeks. But today I've noticed that 2 new pseudobulbs are growing- so late in the season.
What should I do now? Proceed with winter regime or care for these new growths? Will the new psb survive hard winter rest?

They likely won't survive a hard winter rest. I would keep watering and let them develop. This is not a plant that needs to be forced into dormancy by withholding water. It normally keeps its leaves for more than one season. Have you had a warm spell after some cooler weather?

Note this plant grows gloriously outside in Hawaii, where it does not get a hard winter rest. It gets less winter rain but not no winter rain.

Thank you, though I'm confused by your answer. I've read many culture notes and I thought it clearly requires winter rest.

I was also thinking that maybe it's an adjustment issue. The plant might have been freshly imported from south-east Asia, so my much lower temps in the middle of the growing season could have messed with the natural cycle. And maybe I should sacrifice any potential flowers this season and simply let it adjust and grow?

Winter rest doesn't need to mean bone dry for six months. To most orchid growers it means letting the plant get dryer between waterings, and withholding fertilizer. Some Den. nobile types need cool temperatures to induce blooming.

Your home might be warmer and drier through the winter than this plant experiences in habitat.

I meant to give it a 3-month rest, with no water (unless psb get wrinkled).

That is most definitely true, that's why I was planning to move it out to a cool and (very) humid greenhouse.
But in this case I will keep it inside with some watering.
Should I fertilise it? Normally I wouldn't in winter but I would start when new growths appear in spring?

It will grow without fertilizer, but it might not bloom with it. I would not fertilize yet. How cool is your greenhouse?

I do not give my plant any winter rest anymore since where it originated there is no winter but a dry spell in summer and a flood of monsoon rains. Even in the dry summers there is morning dew to give it moisture plus the humidity is high in the environment.
If in flower I hold fertilizer but if there are new growths by all means I feed it.

Here is the link to my anosmum:
http://www.orchidboard.com/community...robium+anosmum

Thank you both, my greenhouse is unheated so it would still be a winter rest if I moved it there.
The problem is that my winter means very short days, rarely sunshine, mostly grey and dull days. And my orchids simply don't grow in winter, they only wake up in spring.

Bud, I've had a look at your anosmum, it looks super big and healthy, I'm really envious. So you were giving it a dry winter rest and then you stopped this practice - any change in the number of flowers?