The cactus-like dragon fruit plant climbs and climbs as high as it can, and then when the tip bends over and hangs down, it is ready to bear fruit. Roy’s got them growing up various trees around the CEFA farm, and in South Africa they’re growing up cement columns which will have lids (old tires) at the top to encourage the hang down fruiting. They’re a tasty fruit, red ones, yellow ones, and very low maintenance – well, unless you have to go borrow a ladder just to pick the fruit.