Verbena bonariensis is a great herbaceous perennial which grows up to around in height, seeding itself all over the place. Despite its height, it is not a dense plant and therefore can be planted anywhere in the border as you can see through it.
10 low-maintenance perennials for the busy gardener! You can still have beautiful flower beds without spending a lot of time maintaining them. Look at this gorgeous lavender/purple/violet-colored perennial border!
70+ Beautiful Purple Flowers (Care & Growing Tips)
My favorite color is purple. I've changed my favorite color a million times in my life, but I always come back to purple. Purple just makes me happy, and honestly, it's just such a calming color, I wish everything was purple.