Maybe you're not familiar with this perennial, but I recommend it. I planted two varieties of it this summer for the first time and they are both still in bloom. It has many small, pink flowers and I have one called "Freefolk Rosy" that has bicolor pink and white blooms and variegated foliage. They need full sun and are easy care. They grow 1-3 feet tall and may spread to 2-4 feet wide. An added bonus--they attract butterflies!