you are welcome!
the suspected parents are both Salvia nemorosa cultivars
Sage (Salvia nemorosa Marcus®)
I do get seedlings out of this one fairly often in my sidewalk cracks
I rarely get seedlings out of May Night.
I have a Blue Hill too,
Violet Sage (Salvia 'Blauhugel')
and it produces tons of seedlings in my rock garden! I think the fallen seeds germinate really well in gravel and sunny nooks and crannies in the early spring.
some of the Blue Hill babies are kinda-sorta blue-ish, like this one
but most are purple.
That's why I was so surprised to have a pink one
