Good question... It appears HLB is present in the root system of an affected plant. From the University of Florida
"5.Can I replant a citrus tree in the same spot where I
have a diseased tree?
If you are going to replant a citrus tree or another plant in
the same location, be sure to remove and kill the infected
tree’s stump with a herbicide to kill all the roots. It is best to
wait for a period of time to make sure the herbicide’s active
ingredient is no longer available to be taken up by the roots
of a new plant."
here is the link:
https://edis.ifas.ufl.edu/pdffiles/PP/PP32600.pdfIf I were you Id wait until spring- and use the current time to make sure any roots are dead from the old plant.