Symphyotrichum novi-belgii 'Henry III'
New York Aster, Michaelmas Aster
Family: Asteraceae Aster
| Type | Perennial |
| USDA Hardiness range | 4A - 8B |
| Exposure | Partial shade to full sun |
| Bloom color | Blue, lavender, purple |
| Bloom time | Late Summer to Late Fall |
| Water needs | Moist |
| Landscape uses | Border, container, massing, rock garden, woodland garden |
| Height | 36" to 4' / 90cm to 1.20m |
| Spread | 24" to 36" / 60cm to 90cm |
| Growth rate | Fast |
| Persistence | Deciduous, broadleaf |
| Leaf color | Green |
| Fruit color | n/a |
| Soil type | Loamy |
| Form | Spreading or horizontal, upright or erect |