.From Wikipedia ......

The round or ovoid fruits are green, with a bright yellow flesh that is often fibrous. It grows at temperate elevations, between 1,000–2,400 metres. Temperatures of its elevated native range make the species technically subtropical, even though its native region is strictly tropical. It has been grown successfully in subtropical foothills of California. Attempts at growing lucuma in Florida's climate typically fail.

There was someone at the tropical fruit club that grows it and he said it has bloomed but never set fruit in 3 years and summer time is hard on it ...

Great place to learn about rare fruit being grown in central Fl Meets 3rd Monday each month

tropical fruit club of Central Fl