Question
I have a Jacaranda tree in my backyard and right now the tree is almost bare. We live in Daytona Beach, FL which I think is a Zone 10b or 11 (I am not really positive)The leaves were very thin and droopy. We made sure that the tree had plenty of water and was careful not to over water it. The actual tree is approximately 10 ft. tall and the trunk is about 6" in diameter. It has never bloomed and is now losing all the leaves and I was wondering if you could try to tell me what is wrong? I love this tree and it's flowers.

I will be awaiting your reply. I hope I was able to explain it enough.

Thank you,
      Judy

Answer
Daytona BEach is closer to a 9A/9B, which is in the upper reaches of the Jacarada's zone. For more on this trees, see see the link, below - it has a chart on page 2 showing it's range:

http://hort.ifas.ufl.edu/trees/JACMIMA.pdf

When I lived in on the central coast of California, I had three spectacular ones in my front yard.  These natives to Brazil are odd, in that they drop their leaves in the SPRING (Feb-March), and stay bare until they flower any time between  April to September.

They are known to be "messy" because of this - always dumping something that needs to be raked up - and not in the fall!

They are tender when young, and get more "hardy" as they get older.  It is a sub-tropical plant, and sickness-wise they are pretty hardy, and not prone to diseases.

Sounds like your condition may be a deficiency of some sort - sun, fertilizer, or water.  Since you've got the water covered, I'd check the other two...

They need full sun.  Are they/is it in heavy shade?  Or, did you have a recent cold snap? (anything close to 25 degrees will kill it outright)

In the soil department, they prefer sandy soil - are they in a heacy clay soil?  How are the nutrients?    Maybe worth a shot of Miracle Grow.

Also, they fail to bloom if they get direct ocean winds or where the heat is inadequate - I don't think that is your problem!...Do you live within sight of the Atlantic?

Just some thoughts.  Wait & watch - again, it has as fairly odd leafdrop/flowering cycle, so it could just be "doin' it's thing" just fine.  ~M