Cymbidiums like a bit of cold weather ( ~40’F) and an occasional frost. I was told Houston is not cold enough for cymbidiums to rebloom.
One plant has done very well and two have done so-so. The one that is doing well has two flower spikes ( see top picture ) that appeared the first week of March. So it can be cold enough in Houston to grow cymbidiums and have them bloom. They are likely to do better on the north side of Houston. A long series of consecutive nights below 55’F is needed for re-blooming. (preferably 1 to 3 months ) They can handle light frosts but will not be happy with extended cold below freezing.
Cymbidiums want a full sun, and a wet spot ( but not standing water ) that is low and protected from the wind. Cold air tends to puddle in low spots that are protected from wind in the winter. Any location you have where roses have done well, that tends to be chilly in the winter should be fine for cymbidiums. The one I have that is doing the best is in the wettest spot of the three plants I have here.
Orchids are known to be heavy feeders so fertilize often. Otherwise they should just take care of themselves and grow into large plants with more flower stems as they get larger.
You can divide cymbidiums when they get too large but they are finicky about that and probably won’t flower for a year or two after you divide them.
They are native to south east Asia and north Australia and grown quite happily in large sections of California.
There is also a miniature version, I do not know if that will do well here.
( The flowers began to open the last week of April. )
I’ve had mixed results with the cymbidiums here. The think the trick is to not let them go dry during droughts and give them some protection from the summer afternoon sun.
The Cymbidium Society of America