Dragonfruit are actually super hard to kill. I moved my entire collection of full grown dragonfruit plants(6ft tall, multiple branches on top), by pruning the top right back and then cutting them off at ground level, still attached to the post I grew them on. Transported them 450km in a box trailer, stood them up behind a shed for 3 months until I finished moving and then built a trellis system to attach the posts to. All are growing well now and at least half are flowering at the moment.