Question
Good morning Mr Wells !
I live in Houston texas ZOne 8B- 4 years ago- someone gave me a " young tree" - I thought that a bushe and planted in the front flower bed - very next to the wall (2,3 feet) and side walk (1 ,2 feet) - and between the Crape myrtle and some other bushes- In years , it was not getting big and some of my co-workers also were told me I have a mimosa tree-
Last year, I  began fertilizing - water plus more soil -and now it talls about 15 feets with  multi trunks ! so I had someone trimmed the top to 10 feets last Spring ( 2013 )- later in spring - "the tree " has beautiful blue flowers that why i am abe to identify it is a  blue Jacaranda  !
I have been researched and known - jacaranda has big / long -shallow root -and a big shadding tree -Plus since I pruned the top - then it gets a lot a vertical shoots from the trunks.
My question are :
1/ Should I transplant the tree to another suitable location - is the percent for that lovely  tree to survice when moving: high or not ?- If not likely- Is it ok for the tree just be there around other tree and spring flower bushes ?
2/ there are muliple average trunks (  5 f to 7 ft ) and one big trunk ( 10 f  )- is it posible for me to cut them all and leave only the big one 10 feet left ?
3/When is the best times to prune or to transplant this tree to other spot ?- and how to do it ?

Thanks for your time !
Jalyn

Answer
I am trying to visualize this tree.  

Now I suspect, if you have identified correctly you have flowers in groups or bunches, perhaps the group being as large as a foot.  The flowers will last perhaps around two months, and then will grow seed pods.  The leaves are also quite large.  

It sounds like you had it topped from 15 feet down to 10 feet, and unfortunate situation for a Jacaranda.

Jacarandas thrive well in your area, and prefer a sunny position and well-drained, fertile soil, preferbly with regular summer watering. They can grow quite tall and wide, so you have to consider location, and yours is not in a good one.

Once your plant, water and add nulch around the roots with organic material to help to retain soil moisture in summer.  Mulch should be no more than a couple of inches.

One issue with Jacarandas is to not prune them, ever.  Pruning will cause serious long term impact to their looks, because when you prune them they will send up vertical shoots.  This takes away from the normal elegant umbrella shape.

Since you have pruned, you will need to be persistent and remove the vertical shoots as they grow.

Now to your questions.  

1) should you move it..  Really you have no choice.  You planted for years ago, it is best to relocate sooner rather than later as the roots will continue to grow making a successful transplant more difficult.  It will grow too large for where it is, and eventually need to be cut down. Wait until late fall though when cooler and less hot sun.  Provide lots of water before and after transplant.  Take as large a root area as practical.

2) one trunk is natural and preferable for this tree, pruning is likely what caused the additional growth.  You will need to remove the additional shoots, they will regrow, but cut when very small.   Leave only the central leader r trunk.  You can prune these back anytime, however if a lot and large preferable do not do them all at once as it will be more vigorous in response to replace.  Try taking one or two and wait a couple of months to take a couple more.  Try to encourage the central leader to take over and grow, rather than shocking it into regrowing more shoots.

3) when to transplant, in all time.  When cooler.   However carefully trim back shoots slowly up to that timeframe.  

We want to carefully nature this tree, and gently bring it back to a more natural form.  It is possible, but is going to take time and patience.

Send pictures, and keep in touch as you go through process.