How to Grow Aromatic Aster
Wikimedia Commons
Aromatic Aster
Symphyotrichum aromaticum
flowerAromatic Aster is a native North American wildflower belonging to the aster family, known for its fragrant foliage and delicate daisy-like flowers. The plant produces clusters of small purple to lavender blooms in fall and has aromatic leaves that release a pleasant scent when brushed. It is a hardy perennial that attracts pollinators and thrives in dry conditions.
When should you plant Aromatic Aster in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Aromatic Aster timeline · Pittsburgh, PA (Zone 6b)
-
Plant Aromatic Aster
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
First Aromatic Aster blooms
Around Jul 16≈ 90 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Aromatic Aster dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9, with best performance in zones 4-8
Sign up free to see if Aromatic Aster grows in your zone — and get a personalized planting timeline.
Get my Aromatic Aster timeline →Growth Stages
Seedling
3-4 weeksSmall leaves emerge, typically with a slightly fuzzy or fine texture. Plant is low-growing and compact.
Keep soil consistently moist but not soggy. Provide bright light. Thin seedlings to proper spacing once they develop true leaves.
Vegetative Growth
4-6 weeksPlant develops a bushy mound of aromatic, narrow, elongated foliage. Foliage may appear slightly grayish-green or dull green.
Establish regular watering schedule during dry periods. Pinch back growing tips in early summer to encourage bushier growth and more flower buds.
Budding
2-3 weeksTerminal and lateral buds form along the stems. Buds are small and clustered, appearing in late summer.
Reduce nitrogen fertilizer to avoid excessive foliage at the expense of flowers. Ensure adequate sunlight exposure.
Flowering
6-8 weeksSmall daisy-like flowers in shades of purple, lavender, or blue-purple open in profusion. Blooms typically appear in fall (September-November).
Deadhead spent flowers to encourage continued blooming. Avoid overhead watering to prevent disease. Water at soil level.
Seed Maturity & Dormancy
8-12 weeksFlowers fade and develop seed heads with fine, hair-like bristles (pappus). Plant slowly dies back in late fall or after hard frost.
Leave seed heads in place for winter interest and to self-seed. Cut back dead foliage in early spring before new growth emerges.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Ensure good air circulation by spacing plants properly. Avoid overhead watering. Apply sulfur dust or neem oil if needed. Remove affected foliage.
-
Spray with strong water stream to dislodge. Use insecticidal soap or neem oil. Attract beneficial insects like ladybugs.
-
Increase humidity by misting. Spray with neem oil or insecticidal soap. Avoid excessive drought stress.
-
Pick off by hand. Use row covers on young plants. Apply neem oil if populations are high.
Uses
Fragrant Garnish & Tea
CulinaryFresh aromatic leaves can be used sparingly to garnish salads or as a unique herbal tea ingredient. The flowers add delicate color and a subtle floral note to beverages and dishes. [source]
Cut Flower Arrangements
HouseholdAromatic Aster makes an excellent long-lasting cut flower for late-season bouquets and fall floral displays. The fragrant foliage provides aromatic interest in addition to the delicate blooms. [source]
Pollinator Magnet
WildlifeThe flowers attract bees, butterflies, and other beneficial pollinators, making it invaluable for supporting late-season insect populations. It provides essential nectar and pollen when few other plants are flowering. [source]
Dried Flower Crafts
CraftDried stems and flowers retain their shape and color beautifully, making them ideal for dried flower arrangements, wreaths, and craft projects. [source]
Traditional Herbal Use
MedicinalAromatic Aster has been used in traditional Native American medicine for its aromatic and potentially antimicrobial properties, though scientific validation is limited. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Aromatic Aster is primarily grown as an ornamental flower for garden display and cutting. Cut fresh flowers in the morning when they are fully open for floral arrangements. For seed collection, allow flowers to dry on the plant and collect seed heads in late fall when they turn brown and papery. Cut stems back to ground level after flowering or in early spring.
Fun Facts
- 🌱 Aromatic Aster is native to the southwestern United States and Mexico, naturally thriving in arid, rocky environments with minimal water.
- 🌱 The plant's name comes from the Greek word 'aster' meaning 'star,' referring to the star-shaped arrangement of ray florets in the bloom.
- 🌱 Aromatic Aster is one of the last flowers to bloom in fall, providing critical food for migrating monarch butterflies and other pollinators preparing for winter.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Aromatic Aster planting timeline
Tell us your zip code and we'll calculate exactly when to start Aromatic Aster seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Aromatic Aster timeline →