Big Orchid = Mature Orchid?

[Ross]

I don't know on most Dendros, but most "mature" plants (many of which are not necessarily "big") are either blooming size or ready to bloom when the current growth matures. Lots of times that means the plant is much larger. Certainly seedling plants are usually very small compared to the parents, but not always (some minis are always approx same size - Sophronitis cernua is one example - but keep adding growths till they are ready to bloom.)

Sorry this post is so complex, but the question doesn't have an easy answer. Perhaps someone else grows this Dendro and has an idea of typical mature growth size. For what it's worth, the answer is partly buried in your last paragraph. I can cite some plants that stayed a certain size, bloomed faithfully, then responded to a different growing regime by doubling in size. They also had much fuller blooms.

Things leading to larger size:

Maturity - older plants with larger parts.
More nutrients - leads to more vigorous growth.
Better cultural processes - better watering schemes, better water, different fertilizer, different lighting, etc.

There are probably others as well. Hope this helps.