You are so right, Lin....the previous owner used it a lot here around her gardens. Over the years I have not kept up with it and can atest to the fact that it will take over.

I hadn't realized muscari was invasive. My understanding was muscari is not invasive while spicata is. Muscari is the clumper, while spicata is the runner and extremely invasive. One account I read noted spicata spreading under a driveway it is so vigorous. Now I see they both are. Hopefully the muscari I planted will behave up here. Thanks for noting this!