They can be shy bearers at first but rapidly become crazy prolific.4 to 8 years for seedlings to start is standard and often there is a season or two with not setting fruit at the start. Nearly all named varieties are hermies, but seedlings can be hermaphrodites (seeded and seedless), male which produce no fruit, self fertile females producing seedless fruit and females which need a male or hermie to produce fruit otherwise they can remain barren.