In the garden, plant asters in areas to succeed other earlier-blooming perennials or to complement late summer and fall bloomers. Tall varieties make great backdrops to early-blooming peonies, iris, daisies, and salvia. Short varieties are nice companions for low-growing perennials, such as everblooming daylilies and geraniums. Once the summer flowers such as echinacea, rudbeckia and coreopsis finish, asters are happy to take over the flower workload into fall.
To create an even more colorful fall garden, mix asters with other late bloomers such as Russian sage, sedum, goldenrod, and ornamental grasses for a stunning late-season color show. Plant taller asters behind bushier perennials in fall, such as chrysanthemums, to hide any dying lower branches on the asters.
There are many dwarf asters that are low-growing and make good additions to rock gardens and low-perennial borders. Asters can be used in containers as well. Dwarf varieties that only grow less than 1 foot tall make a nice complement to the traditional fall container arrangements. For example, the heath aster 'Snow Furry' produces clouds of white blooms that are pleasing when planted next to bright orange, purple or yellow mums or near ornamental cabbage or kale.