I'm with Asarum here ; looks very much like the blue-flowering Pontederia cordata .
There is a form though known as P . cordata lanceolata which strongly resembles this .
It does look very similar to the one you mentioned especially but does pontederia grow leaves along a stem or from rosette? because the plant seems to be developing a stem if you look closely in the last pic
Posts
I don't think it's coreopsis