Question
Will the Jacaranda propagate by air layer method?

Answer
Hi Suzanne,
Thanx for your question.  According to Texas A&M University, air layering is possible on most hardwood trees.  Here is a link to a very good instrucional section that I think you'll find useful.  I hope this helps.
Tom

http://aggie-horticulture.tamu.edu/extension/ornamentals/airlayer/airlayer.html