purpleinopp said:Pic 2 is some kind of Persicaria. I would pull if in my yard. In all of the ID discussions I've seen, there are no volunteer plants with chevrons on their leaves that would be well behaved in a cultivated setting.
crawgarden said:Top pic maybe phlox.
Welcome to the site!
crawgarden said:If Phlox like the spot, they will spread via stolons.
purpleinopp said:Persicaria plants can just show up. If you still have the package, it might list the seeds included. It can be helpful to keep those packages so when seeds sprout, you can try to match them to the names on the package. If they don't match any, they are probably sprouts of other seeds, not from the package.