High temperatures (over 80 ish degrees) cause the fruits to stop developing and make the pollen sterile in Cherimoya. That is why they can be grown in Puerto Rico or Hawaii and not Florida. I think we could fruit any Cherimoya with the right cultural care. It would need to defoliate in September and bloom in October so that the fruit could develop over the cool part if the year and then finish ripening in April before things got too hot.