Papayas are best adapted to the humid tropics. Though requiring plentiful rainfall, well-drained soil is important as papaya is sensitive to short periods of flooding. Trees can have male, female, or bisexual flowers. To avoid sending out seeds resulting in unproductive male trees, ECHO purchases seeds of varieties known to produce female or bisexual trees with the majority of trees being bisexual. Female trees can be pollinated by a bisexual tree. Protect papaya trees from freeze and heavy frost.