Hello all, I'm hoping you can help me identify some growth in my butterfly garden. I am a bit of a rookie gardener, I've made some mistakes including not marking things all that well (my makers disappeared over winter or ink smeared to make them illegible).

Any help on identifying these is much appreciated!

1. this is very common in my garden, I haven't seen it much elsewhere so I assume I planted it, but I have no recollection and my markers all wore off over the winter. They were smaller in the fall, survived the winter and they are various sizes, this is a larger one.

2. This just appeared the other day in the same vicinity and appears to be budding on top. I thought it might be Reseda Odorata (sweet mignonette)... it has a square stem.

3. This one also popped up this week, I have no idea, but also appears to be budding.

4. I definitely planted these, I thought they were Echinacea purpurea, as I planted that, but now I'm doubtful... they seem to be growing in various "clump" sizes, some are over a foot in diameter.