Hi there!
I though it was time to give you a little heads-up of my little buddy after its first winter in IL (I asked the vendor when I bought it thus I know it was born and raised in FL before moving here last year for the MBS exhibit).
I put it inside in the falls when the T was around 50 F and put it in a room where it's never really hot (around 60-55, never bellow 55F).
It was in front of a sunny window, on a table, approx 1 & 1/2 foot from the heater (central water system so no too dry) and I watered it once a week, on the week-end. I soaked the pot twice and the drainage water was raining on top of a walmart ficus over which I was holding the pot, it die btw...
And here it is this afternoon after its first day outside during its spring cleaning:
The scissors aren't for the scale, it's just to brag with my new tools
I didn't use them a lot as I just removed one piece of branch that wasn't looking so well:
But for that I used my brand new branch cutter

So no big work at all today as you could see, it didn't need it anyway.
Just this part close to death I was really please with such a low casualty, I was expecting much more!
Furthermore this branch is even better off as there is already a new leader to replace it (red arrow to see you the spot):
I finished the cleaning by just helping the dead leaves to fall by sweeping them with the raffia from the guy wiring I put on in the falls and took off today (a Raffia spa treatment for gentle exfoliation or something) and I really love the way my little serissa looks, winter colors fit it well, it make it green chicks:

Now it is back inside and I think it will do that (day out, night in) until we reach a - steady - up 55 at night.
The next step will be in June if I remember well the advises of
@Mellow Mullet with a straight air cut (close to US Marine hair cut) of the foliage and the work on the nebari.
Unless opposite advice from other Nuts I plan to do both the pruning and the re-pot at the same time (speaking of re-pot: great soil from the nursery! One year and 3 really contrasted seasons and it's still very good

)
For the roots, as soon as I bought the tree, I was thinking negari (and promised
@Cadillactaste to show the process a couple days ago actually) and envisioned something like
@Mellow Mullet drew above.
But now I don't know anymore...
May be it will be a sort of 'Negari over the rock' style with this rock:
We'll see!

Anyway I've got till June to think about it
