Q.night blooming cereus
My night blooming cereus is growing a long shoot that is 4 or 5 feet tall right now. It has some hairlike (inch long) air roots coming out of it, but no leaf buds. Should I leave it to grow or should I cut it off?
The queen of the night has the potential to be a very large plant, up to 6 feet tall in containers such as yours. What you are seeing is the nature of the beast - it will form tall stems on which flat leaves emerge. You can use a bamboo rod to support your plant. Or, if you desire, you can shorten the stems to a more manageable height - the best time to prune is after flowering.
For more information on the queen of the night plant, please visit the following link:
https://www.gardeningknowhow.com/ornamental/cacti-succulents/night-blooming-cereus/night-blooming-cereus.htm