12 Perennial Companion Plants For Blazing Star Flowers : Although these non-native, delicate, tuberous flowering bulbs are classified as annuals in USDA Hardiness Zones 3–7, they have the potential to survive the winter in Zone 7 if they are provided with additional protection. Alternatively, the tubers can be harvested for storage and replanting purposes.
12 Perennial Companion Plants For Blazing Star Flowers
Although these non-native, delicate, tuberous flowering bulbs are classified as annuals in USDA Hardiness Zones 3–7, they have the potential to survive the winter in Zone 7 if they are provided with additional protection. Alternatively, the tubers can be harvested for storage and replanting purposes.
1. Agapanthus
Perennial agapanthus has rounded clusters of lily-like blue, violet, or white flowers. It is suited to Zones 6 to 11, where it blooms in full sun in the spring and summer. A mature person’s height and width range from 22 to 44 inches. While the tallest varieties make great back bed anchors, shorter cultivars are better suited for beds and borders.
2. Allium
Native to the world, Allium (Allium spp.) is a perennial rhizomatous bulb that grows in circular flower heads filled with star-shaped blossoms that can be blue, green, pink, purple, red, white, or yellow in color. Choose cultivars that bloom in the spring, summer, or fall in full sun to partial shade; they are ideal for Zones 3 to 9.
3. Anise Hyssop
Native perennial anise hyssop, ideal for Zones 4 to 9, has multi-flowered spikes that are blue, lavender, or purple. When planted in full sun, they provide a beautiful summer sight. Growing to two to four feet in height and one and a half to three feet in spread, they provide a strong, vertical statement of contrast among the rounder dahlia blooms.
4. Aster
Asters offer late summer to fall color in Zones 4 to 8, where they thrive in full sun and tolerate dappled shade. Many are native species. With a spread of eight to 36 inches and an aster height ranging from six to 72 inches, there is an aster height for any purpose. Masses of tiny, daisy-like flowers in blue, pink, purple, and white hues serve as texturally gentle filler in between or behind dramatic, focal dahlias.
5. Bee Balm
With petals like fireworks, the rich red, pink, or purple hues of native perennial bee balm (Monarda spp.) play well with dahlias’ equally vivid tones. This summer bloomer never disappoints with robust stems that soar to three to five feet tall and a spread of 18 to 36 inches. It is suited to full-sun and part-shaded locations in Zones 3 to 9.
6. Black-Eyed Susan
Native perennial black-eyed Susan has golden, orange, or red petals surrounding deep brown center disks for swaths of sizzling full-sun summer color in Zones 3 to 9. It is a flexible bed and border companion for mid-section settings coupled with medium and short dahlias, standing two to three feet tall and 12 to 18 inches wide.
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7. Blazing Star
With its regal heights of two to four feet and narrow spread of nine to eighteen inches, it’s a great choice for anchor positions in beds. Additionally, it works incredibly well when interplanted with dahlias to produce an eye-catching alternating pattern that highlights each plant’s distinctive characteristics. There are many varieties of blazing star that bloom white.
8. Common Switchgrass
Native to Zones 5 through 9, common switchgrass (Panicum virgatum) is an ornamental grass that grows best in full sun but can also withstand partial shade. From June until October, when it flowers and sets seed, a rosy haze appears to float above each clump of slender grass blades like a gentle pastel cloud. Mature measurements range from two to three feet wide and three to six feet tall.
9. Coneflower
With daisy-like petals in shades of orange, purple, red, or white, native perennial coneflowers (Echinacea spp.) are a Zone 5 to 9 favorite. With full sun to partial shade, plants bloom from summer to fall, when the cone-like seed heads attract foraging songbirds. While dwarf kinds can grow as little as six to twelve inches tall and wide, standard plants can reach a maximum height and width of three to four feet.
10. Cosmos
A summer sensation in full sun, the delicate, squarish petals of cosmos (Cosmos spp.) may be orange, red, pink, purple, red, yellow, white, or bicolored. Growing to heights of one to six feet and widths of one to three feet, this annual for Zones 2 to 11 responds to even the smallest breeze with a whisper of movement that draws the eye into the garden.
11. Crocosmia
Zones 6 to 9 are ideal for summer-blooming crocosmia, which prefers full sun to partial shade. It features delicate orange-red, lily-like blooms atop arching racemes that emerge from spear-shaped green foliage. The strikingly angled leaves reach a mature height of one to three feet and a spread of one to one and a half feet.
12. The Floss Flower
Low-profile annuals for Zones 2 to 11 that grow in full sun and bloom from summer to fall are lavender-blue, pink, red, or white floss flowers. Dahlias’ smooth, wax-like petals contrast texturally with fuzzy button-like flowers. Mature heights vary from six to twenty-four inches, with a six to twelve-inch spread. Make a ribbon with a complementary or contrasting color to place in front of your precious dahlias to highlight them beautifully.
