John.....Wow thats a lot of water! Don't trust a landscaping co. In fact most would say stay away from them except for mowing and edging. Do your own research on what that tree needs and do it right away or it will be dead. Questions that need to be asked before determining the water amount and schedule.

What kind of soil? Clay...rock..sand etc.

How is the drainage?

How hot or cold is it!

How much rain have you gotten?

You get the picture. Remember the more you know the better off you are when it comes to growing stuff in this BAD soil or extreme heat

Just wanted to add...we had one in S. CAL and they do loose leaves in the winter. They also drip this sappy stuff.

Jacarandas yellow and drop leaves during cold weather. Mine is still leafed out, but it's an older, established tree, which will still defoliate during really cold winters. Your little sapling is undoubtedly more delicate.

You really should have waited a couple months. Absolutely terrible time to put
anything in the ground, let alone a drought tolerant, marginally tender
tree. Good luck. If it survives until spring, it should be fine.

Your drip timer should probably be turned off in winter (and only run manually as needed), then set to 90 minutes once per week in spring, perhaps upped to twice per week through summer, depending on what you're irrigating.