Buah kesusu share many of bad juvenile growing phase like baccuarea angulata. Best put the young plant in a large butcher bag, rubber band the top, the high humidity at all time speed it along, after the four set of leaf, you can than take it out of its humidity bubble.
50 % shade 30% shade seem to work for me in south florida. I test four plant last year between 8-12 inches. They survived the first drop down to 31 f, a week later another freeze around 32 and they start to drop all leaves... Thrive through until a couple more cold snap 2014 and they all caught the same disease like my baccuarea angulata, i lost all buah kesusu but three angulata survive cold. Seem tip look like it been steam cook slowly died from cold stress syndrome & fungus attack.
Note to myself, order a third shipment for this year and grow them in a large butcher bag & not play the cold roulette until they three years old. Hope supplier can get mE
e 20 more since their fruiting season is almost done. I am thinking of tissue culture after receiving adam's white jade tissue culture pineapple as my next propagation for this alien fruit. So hikoku we might have to set up a tissue cultures lab to get some planting out of this UFO fruit.