Originating in tropical America, Sugar Apple has baseball-sized fruit that tastes like sweet custard. The unusually shaped, segmented fruit separates easily for eating when fully ripe. Within each segment is the sweet custardy pulp plus one black seed. Thai Green blooms in spring and the fruit are harvested in fall. The tree starts fruiting early at just one or two years old. Grow in full sun in tropical zones or in a large pot in northern zones and allow the plant to summer outside.