Of course, it is Joe Pie Weed, a perennial that is native to North America!!!
Thank you everyone who looked at the pictures and tried to guess.
The moment I saw Randy Emmitt and Tina comments and later Kathleen, susanjtweit and Frances comments, I remembered that I got several little plants last year from my friend who grew them from seeds. They were not prominent last summer, just about 2' tall. The blooms were puny, also. (So, I didn't pull them all out and I did see the blooms!)
I can't even see JPW on the picture below, although it should be somewhere here in this jungle!
(But I see something in the right part of the picture that I need to remove from this bed - it's a tomato-red geum as Grace called it, which doesn't go at all with this color pallate!)
What was confusing is that I have tens of seedlings nearby and believed that they were Joe Pie Weed seedlings (Now, I know that they are not!
They should be .... foxgloves!)
I don't know what type of JPW I have. While researching, I met such names as Coastal Plain Joe-Pye Weed, Hollow Joe-Pye Weed, Spotted Joe-Pye Weed,Sweet Joe-Pye Weed, Green-stemmed Joe-Pye Weed, Queen of the Meadow, Gravel Root, Kidney Root, Purple Boneset.
In my garden, JPW gets full sun and regular watering. I don't want it to grow very tall.
They say, depending on the species and the growing location, it can get very tall (up to 8-12!!! feet).
It was mentioned on one of the Internet forums that you can control JPW height by keeping it dry or shaded which is not applicable to my situation.
Some gardeners recommend to clip it back. They think it could be done up to the middle of June, and it should still bloom.
I might do it to keep the plants shorter and bushier.
My plants have mauve-pink flowers (Yes, Silvia!). I read about a variety called Chocolate Snake Root which has shiny and deep purple stems 36-40" tall covered with chocolate-purple foliage and white flowers in terminal corymbs. Another variety, Little Joe, grows 3-4 feet that is more suitable for small gardens and has pink flowers. Baby Joe is the smallest, 30-36" with fuschia-colored blooms. Speaking about blooms, the flower clusters of JPW can get as much as 1 foot in diameter!
Based on your comments and other information, I should expect to see some butterflies in my garden this summer, shouldn't I?
I like the fact that it's deer resistant, too!
To prevent it getting weedy, I think about deadheading the plants before the seeds spread (Yes, Aunt Debbi/kurts mom and Joanne!) . I might also try to replant it to rear of the garden. By the way, JPW is cultivated easiest from cuttings.
Thanks again everyone for your assistance!
The last thing - I think I need to find a plant that can boost my memory, because I actually planted it myself and I saw the blooms last year!!!
P.S. Victoria, as Tina said it is not in getting it right but in the attempt at trying for sure. It is ME who was absolutely clueless!
August update. Here it is: