PERENNIAL - Pincushion Flower Pincushion flower, or scabiosa, serves up dainty blue flowers all summer and into fall, making it one of the longest-lasting bloomers in the perennial bed. It likes sun or partial shade, and is best at the front of the bed. The foot-tall variety 'Blue Butterfly' stands up to heat best.
Hollyhock - Lend old-fashioned charm to your perennial border with hollyhock. Known for its tall spires of colorful blooms, hollyhock is the perfect back-of-the-border plant. Old-fashioned selections can easily grow more than 6 feet tall in a spot with full sun and moist, well-drained soil.
Top 20 Perennials for Your Garden Russian Sage Suited to larger gardens, this 3-foot-wide by 5-foot-tall perennial creates clouds of blue flowers in late summer. Russian sage likes sun, and is tolerant of drought and heat. Plant it at the back of the bed and give it room to grow.
Meadow Sage - violet-blue flowers from midsummer to early fall - loved by butterflies and hummingbirds and are great cut flowers - up to 28 inches tall ...for front of garden?