Certified GKH Gardening Expert
You say the native larkspur, but I suspect if your garden is being overrun, it is probably the annual larkspur. The perennial delphinium is a short-lived perennial. Annual larkspur can be relocated when they are vey young, but they do better if left alone. In late summer when the seeds are ripe, collect the seeds and disperse them where you would like to see them come up the next year.