My guava still is producing flowers

So how large are the fruits now? I am worried that mine will be clobbered by frosts before they ripen.

Joe:
I have bad news.
None of the flowers turn into fruitlets. Once the flowers opened up, the flowers dried up.
It is the same way as my Key lime. Both trees have tons of flowers, very pretty and so lush but none I mean none turned to fruitlets even. The petals wilt and die.
I am beginning to think that those two need intense heat for so long for the flowers to continue to develope to fruit.

Benny