Penstemon

My penstemon - which I bought at a nursery years and years ago and has spread itself around willy nilly since then - is starting to bloom. There would be more of it if it didn't choose places at the edge of the lawn where I can't stop The Husband from mowing it. It also comes up in between the cracks in various bricked patio places. It's not very smart about avoiding getting in trouble with TH. I have no idea what its proper name is. There are SO MANY of them! Clearly it's one of the blue ones though.