After its looking comfortable outside, id get a couple bags of good soil and plant it in the ground. That thing could get huge. The roots would really take off in fresh soil, while sparking the top growth.

Just my thought. I do Bonsai and after a re pot they always take off, thats why i re pot my outdoor grow 2-4 times before they go into the ground. Works for me. Oh and those temps are no big deal, mine are growing in fall at those temps just getting ripe:rasta: