Plant getting smaller

[sthh]

My Den Phok bong x Den little princess is reblooming, but i noticed that there are less flowers, and the stem is smaller too. Should i do anything?

Initial bloom: sept 2011


Current bloom: Jul 2012

[Ray]

That is usually indicative that the plant is not getting the level of care that it once did, often in the nutrient department.

[Gage]

It looks like it was left in the cold and lost leaves, which set it back.

[sthh]

Hmmm, i fertilise the plant weekly with a weak fertiliser gaviota 63 21/21/21 and once in a while the flowering fertiliser. This dendrobium hybrid has very thin long roots, unlike most other dendrobium i have. I would have change the mount, if i can yank it out, and mount it on a fern bark instead. Seem like a delicate hybrid.
And the plant is grown in the balcony with morning sun in the tropics, but still have a habit of losing all it's leaves after a few flowering spikes. Is that in it's ancestry or is it a problem?

[Bud]

Its a hybrid so it must have improved genes....it is supposed to improve on every blooming cycle....you must have more blooms; bigger brighter colored ones....more keikis to form more spikes with bigger roots that in a couple of years you must have a specimen that gives you a magnificent display of flowers....
Ray is right....you must review your Dendrobium culture get a refresher's course and start from scratch....undo what you have been doing because it is not working