I don't but I do grow quite a few dragonfruits. My secret is to buy the little grafted day-glow cactus plants when they are on sale and chop off the ball shaped neon pink cactus and repot the base plant - it is always a short stem of dragonfruit cactus. I won't know what hybrid or species they are until they bloom and set fruit which may be a year or so. My plan is to grow a ton of them and only keep the best tasting and easiest to grow. So far all of them have been very fast growing and easy easy easy. I usually pay around $1 or $2 per plant.

Well, I'll be! Thanks for the tip, trianglejohn! I'm going to get one today!