Growing New England aster is one of the best ways to add late-season color and support pollinators—especially in Tennessee gardens.
Why Grow New England Asters?
- Bloom late summer → fall (when most flowers fade)
- Critical nectar source for bees & butterflies (especially monarchs)
- Native to much of North America → hardy and low maintenance
Planting Basics
Sun
- Full sun is best (6–8 hours)
- Tolerates light shade, but blooms less
Soil
- Average to rich soil
- Prefers well-drained but slightly moist soil
- Tolerates clay better than many perennials (great for TN)
When to Plant (Tennessee)
- Spring (best for establishment)
- Or early fall (at least 6 weeks before frost)
Spacing & Growth
- Height: 3–6 feet
- Spread: 2–3 feet
- Space plants: 18–36 inches apart
- Can get tall and slightly floppy without support
Watering
- Keep evenly moist during establishment
- Once established: fairly drought tolerant
- Water deeply, not frequently
Maintenance Tips
Pinching (VERY important)
- Pinch back stems by 1/3 in late spring (May–early June)
- Results:
- Bushier plants
- More blooms
- Less flopping
Deadheading
- Not required, but:
- Extends bloom time
- Keeps plants tidy
Bloom Time
- August → October in Tennessee
- Colors: purple, pink, lavender (with yellow centers)
Pollinator Magnet
- Attracts:
- Native bees
- Butterflies (especially monarchs)
- One of the best fall nectar plants
Fertilizing
- Light feeder
- Add compost in spring
- Avoid heavy nitrogen (causes floppy growth)
Cutting Back (End of Season)
- Leave stems standing for winter habitat (recommended)
- Cut back in early spring
Dividing
- Every 2–3 years in spring
- Prevents overcrowding and improves flowering
Common Problems
Powdery Mildew
- Most common issue
- Prevent by:
- Good air circulation
- Full sun
- Watering at soil level
Flopping
- Fix with:
- Pinching
- Proper spacing
- Less fertilizer
Great Companion Plants
- Solidago (goldenrod)
- Echinacea purpurea (purple coneflower)
- Rudbeckia hirta (black-eyed Susan)
These create a native prairie-style planting that thrives in Tennessee.
Pro Tip (for Cut Flowers)
- Cut when flowers are just opening
- Strip lower leaves
- Long vase life + great for fall bouquets