Next stop - Oz Trailya?

I swear these things get deeper every year.
I have to admit I quite like Chionodoxa, but they're WAY too rampant. They've taken over "The Heap" and are making a determined bid for one of the front borders.
What gets me is how fast they get so deep, even the "babies" with 0 or 1 flower are damnear as deep as the established ones. And, as seen by the one on the left, they're not over fussy about lying around on top either.