How can i get rid of spiderwort. It has taken over my garden

I have no idea but when you find out, let me know will you?

Currently I have it in 2 raised beds. One in the back is 8' X 8' and I just leave it alone. When it blooms it is so pretty!
It is now in a front raised bed and spreading rapidly. I can't spray a weed or plant killer because of other perennials in the bed. It is growing with lambs ear, small Hostas, cranesbill and others. I don't want to take the chance of contact spray hitting other things or intertwining roots.
So what I am left is by digging out a section every spring. I get rid of everything present but I get a little sprouting next spring. I am hoping that repeated digging will eventually give me the control I need.

We get those about every other year. This year there are small bushes all around the yard of the blue. Had seen a pink one and even potted a purple one because I thought it was pretty. Purple isn't doing so well. Can you just weed them all out if you want them gone that much?

I try that section by section but yet they return. About 50% less, but they come back.

I've had to go dig and remove chunks as well, only so many friends who will take enough, or any..
Also cut off bloomed stems before any seeds can fall. But they spread by roots so well, it is hard to get it all.
I had found it wild, then got some cultivars in swap, so I have a couple colors, plus Sweet Kate with chartreuse leaves.

Maybe a good one to plant with competing tree roots to rein it in..