Another shot...

That is an intense colour. Lovely.

Lovely, I envy you. I'm spectacularly unsuccessful with nobiles. They either don't bloom or make a lackluster flower or two. I know what you are supposed to do and give them the dry, cold rest but can't get them to bloom. I have given up on them.

One of the reason I have almost entirely healthy, vigorous plants in my collection is that I banish the ones that don't like me. After 2 or 3 tries I'm tired at looking at non-blooming stems or leaves and off they go to the numerous auctions we have in our area where the societies bug you for plants. If they want to live with me, they need to put out. Hmm, I have heard that before.

Nick

Nick,
I'm certain it is not you. You are far too successful in flowering orchids in a very broad range. Your climate is very special that humans and many plants are happy there. But there is an orchid for every micro clime. An answer that I think is not wort pursuing is build another greenhouse with yet another micro clime. All orchid growers would be pleased with your "limitations". Including me.

I have an Australian dendrobium kinglanum that bloomed once in 15 years. And it was pitiful. It does not belong here. I'm sure if this plant lived in the right climate it would be a good bloomer...