Advertisement Gayfeather The dramatic spires of this sun-loving perennial create an eye-catching vertical element in the midsummer garden. Reaching up to 3 feet tall, the lavender, purple or white blooms attract butterflies and hummingbirds. Gayfeather needs full sun and air circulation to avoid mildew; plant roughly one foot apart. USDA Hardiness Zones: 3 to 9
Delphinium The hardy Blue Fountains delphinium, shown here, is the ideal choice for an exposed garden or mixed border in full sun and well-drained soil; at 32 to 39 inches tall, their early summer blooms can withstand wind and do not need staking.
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.
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.
Giant Scabiosa Cephalaria gigantea (Code: PCEGA) Grow amongst tall perennials and grasses, or at the back of a border against a drak hedge. Masses of yellow flowers dance above the perennial border like primrose fairies.
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.