I love kingianum of any color, but white blooms on a large specimen is quite the sight!!! and their fragrance!
Yes, yours look very much normal to me.
Yours came with flowers, so it is normal.
They come in many different sizes. Some are short and some are taller than others, but most of them do not grow that tall anyways.
Newer leaves are usually lighter green and as they mature, they turn darker green, given that of course, it gets enough light.
These plants need a lot of light, so give it all the light you can short of burning.
The upright growth of pretty much any plants is due to the fact that they are grown outdoor, greenhouse, or light setup. Windowsill growing, as nice as it is, usually results in plants growing side ways of some degree. It does not harm the plants of course, just a bit odd look.
You are right that these plants need winter rest. Many people will tell you no water the entire winter, but it is not the way if you want healthy plants.
Sure, they will survive such drought, but not needed nor necessary.
Chilling is more necessary than no watering as the winter chilling is what helps theses guys set spikes.
When kept quite dry, these plants can stand near freezing. You don't need that kind of extremem cold, but they do need quite cold winter to bloom profusely in the spring.
Too warm, they won't bloom but keep on growing and growing.
Water a lot while it is growing now.
Reduce water once the current growths mature in the fall, then reduce further during the winter rest.
If you see canes slightly wrinkle, give it a good drenching. Then wait until the potting mix is completely dry again. This can be about every two weeks or more depending on how cold and how dry your winter growing condition is.
Happy Growing!
dendrobium kingianum var. alba
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