Aromatic aster is a Missouri native perennial that transforms fall gardens with violet-blue daisy-like flowers from August through November. This compact, bushy plant grows 12 to 36 inches tall and spreads 12 to 24 inches wide, thriving in full sun across hardiness zones 3 through 8. Its stiff stems and aromatic, blue-green foliage tolerate poor soils, drought, and clay with remarkable ease, while its long bloom season and pollinator magnetism make it a genuine workhorse for gardens that need color when most plants are fading.
1
Full Sun
Moderate
3-8
36in H x 24in W
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Moderate
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Small, showy flowers with violet-blue rays and bright yellow centers dot the plant throughout fall, attracting butterflies and birds when gardens need them most. The aromatic aster handles drought and poor soil conditions that would challenge other perennials, making it one of the most forgiving fall bloomers for harsh sites. Deer leave it alone, and it naturally resists serious pests and diseases, allowing you to grow it without chemical interventions.
Aromatic aster serves as a ground cover and late-season pollinator plant, particularly valued in prairie gardens, native plant landscapes, and xeriscapes where drought tolerance and minimal maintenance are priorities. Its long fall bloom period makes it essential for gardens designed to support migrating butterflies and birds during their critical seasonal transitions.
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Start seeds indoors at temperatures between 60 and 75 degrees Fahrenheit. Transplant outdoors after the last frost when seedlings have developed several true leaves.
Harden off seedlings gradually over 7 to 10 days before planting outdoors after the last frost date. Space plants 1 inch apart in full sun and well-drained soil.
Cut back stems after flowering in late fall to prevent excessive self-seeding and to maintain compact growth. This pruning also prevents stems from splaying open under the weight of heavy autumn blooms.
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“Symphyotrichum oblongifolium is native to Missouri, where it naturally inhabits limestone glades, slopes, prairies, and dry open ground. This species has been appreciated by native plant enthusiasts and prairie gardeners for decades as a reliable, low-maintenance perennial that reflects the resilience of tallgrass prairie ecosystems. Its introduction to cultivation honored the plant's ecological role and its ability to thrive in conditions where ornamental alternatives fail.”