It produces once every 8 days after taking 28 days to produce the first tree. Then in the greenhouse, you can effectively have up to 116 ancient fruit trees. Then I throw them all into kegs which takes 6 days.

Throw your ancient fruits into a seed maker for more seeds so you can grow more at a time. This works well end-game because I get to sleep as much as I want :D

Damn man i got only the acient fruit tree and its drops like one per week