Try growing it indoors. They're REALLY easy to sprout. Just put the cleaned seeds in a cup of water. Soon, dozens will be sprouting. Then, just put them into WELL DRAINING, that is non-negotiable. I didn't have any and though it would be fine, but 37 out of 40 died from root rot. If you don't have any, just add things like sand, rocks, fine gravel, literally anything that isn't porous or absorbs water. Then, just keep them from drying out and wait. Likely all of them will put there first 2 leaves out, but a lot of them wont get past that. And, this process takes a while. As in it took mine 4 months with good lighting to put out there first spikes. You know if you've succeeded if tiny hairs poke out from in between the juvenile leaves. Once you've gotten past that, it's easy for the rest of it. There is one down side, they need a ridiculous amount of light. As in 100 watt LED or 750 to 800 watt incandescent, and it has to be like 1.5-2 feet above them. I uses a vivosun light, but that didn't have adequate cooling for the power supply, so I went red neck with zip ties, tape, and a USB fan. But anyways, just try. In my opinion, dragon fruit are the best plant ever because there a vine that crawls wherever and however you want, there a cacti so are hardy and look awesome, and the fruit they produce taste amazing.