obedient plant.

i just cut the blooms off once they are done so they don't flop too much.

Physostegia virginiana/obedient plant. Late blooming (early fall where I am) perennial that is available in both pink and white. Where you are located I'm guessing it blooms closer to August.

According to what I've read it can be invasive/aggressive--six years ago I planted a single plant given to me by a neighbor but immediately ripped it out when I read it was possibly invasive. This year I noticed there are several that have stubbornly returned from the original. The jury is still out on whether or not I rip them out since they do attract beneficial pollinators.

I just took the photo it started blooming this week in North Carolina. It hasn't been aggressive but was impressed at how well it came back.

I just took the photo it started blooming this week in North Carolina. It hasn't been aggressive but was impressed at how well it came back.

The white one for me wasn't too aggressive compared to any other perennial. The standard purple one (don't know the variety) is aggressive and have to keep an eye on it. It's loosing the battle with a clumping bamboo though so it can't go too far. Any remnant of the runners that you leave in the ground will start up new plants but the are easy enough to pull.

The white flowered Physostegia virginiana/obedient plant Is probably P. "Miss Manners". I had it for several years in a bed and it did not spread at all. It finally died out after two or 3 years of gradual decline. I liked the plant, but it never had the vigor of it's pink invasive relatives.