A photo of it would help us help you. How tall is it? Is it in the ground now, or in a container? Without seeing it, I'd say leave it alone, no need to prune.

Hey there, I bought two dragon fruit cuttings already rooted in 1 gal pots back in April and put them in a single 15 gal pot inside a trellis on wheels. The trellis is 6ft high and 18" wide.

I pruned my dragon fruit heavily until the main stems reached the top. The vines want to send out lots of lateral growth, but I've seen commercial growers prune them to a single vine. Then, once they reach past the top, cut the stems, sending out lots of outward growth. I still get some shoots coming off the main stem but I always pinch them off.

I'm planning to put it into a 32 gallon container and build a trellis for it.

Jay
I am in the process of building something similar to yours.

This post was edited by sae22 on Wed, Oct 15, 14 at 0:33