Larry, That curry tree I have I got back in spring of 2004 or 5, and I got a small, 6" rooting, which grew very quickly, and by fall was well over 2', in a 4 gal bucket. When brought indoors, it grew well in front of a south facing window, but grew so tall, that I wanted to cut it, to see if it would branch out. I found out that this does work, so I cut the top 6 inches off, and it worked - it branched out, and this also seemed to trigger those little shoots coming up from the roots, which later form new trunks. Most I cut off, but have left a couple.
In the beginning was about 5 years before I had to re-pot it, but now it took only 3 years until it needed re-potting. I could tell, because it seemed stressed, as it succumbed to those scale insects, which it was free of the last two years. I trimmed it way back, then sprayed with an orange oil solution - the best thing I've found for killing those things, though it scars the leaves. That's the only problem I've ever had with this plant, and just 3 times.
Last time I re-potted, it was from a 5 gal fabric pot to a 4 gal SIP. It grew even better, but only lasted 3 years again, though this time, the soil mix got sort of "muddy", due to the organic substances substances decomposing - worm castings, and the coir. This is why they figured out that coir doesn't last as long as peat moss I earthboxes - peat doesn't quickly decompose!
This time I went back to the fiber pot - a 7 gal one - with a severe root pruning, as always. And this time I used Promix BX (which has a peat base) with mycorrhyzae, and some extra perlite, as well as granular diatomaceous earth, for drainage and aeration. I also put some DE powder in the mix, and extra in the upper 2" or so, to help against insects. To fertilize, I moistened the mix with a fish fertilizer - 5-1-1 - figuring that by the time it comes inside, the smell will be gone! After that, I will fertilize with one of my hydroponics fertilizers, designed for greens, which I also use for seedlings, since they have all micronutrients needed. For watering, I have a drip line, hooked up to one of the timers.
At first, the curry tree was slow to start up, compared to the lime trees, which I re-potted at the same time, but it has taken off, as you can see!
When I bring all of those inside, I'll trim them WAY back (I seal the cut stems with pruning paint, or liquid electrical tape), and well above the soil, then put some tanglefoot on the first 2" or so of the trunks, to help stop any insects crawling onto the plants. Before bringing them in, I always make a solution of H2O2, and soak the upper few inches of soil, to hopefully kill any of those pests, though I don't know if this does any good.