Yes, it's tansy. They can be invasive in some areas, spreading aggressively by seed as well as underground runners. If you pick the flowers, the seeds won't be a problem. In my clay soil, they don't compete well against grass, but in sandy soils they do spread. Hope you get some good use out of them!

Thank you!! They have definitely spread over one bed, so I'm trying drying the flowers this year.

Best,
Stacey

Yes, first two are definitely Tansy. You probably don't want it IN your garden, or else be sure to dead head it. To dry, pick the blooms when they first began opening and just hang them, they dry nicely.It is considered a bad weed in most areas. I have to agree that it is pretty.