i had caerulea growing for a while
after it is established, there will be runners all over.
Incarnata runs also, but not as much for me as caerulea.
caerulea is more cold tolerant than Incarnata,
both will die back in a freeze, but usually come back in spring...
they dont always though, and im not sure why.
Incarnata is much tastier, and it grows like a weed here.
and usually fruits fairly easily.