Zuzu,
I did a bit of looking on the fortiana and huey rootstocks. Seems the huey is more hardy to temps than the fortiana rootstocks. Both seem to be resistant to nematodes. In my area, believe it or not, temps can drop quite low for Florida. Last week we were down to 22. Sometime back in '06 or '07 we had a low of 8 degrees.
No matter then it's crap shoot between nematodes and low temps.
In the end, it seems January is a good planting time here, given the right stock
