Hectonichus / CC BY-SA 3.0
garden
Aster
Aster bietii
Overview
Late-blooming perennials that provide crucial nectar for migrating butterflies and bees when few other flowers remain. Native asters are keystone species in North American ecosystems, supporting over 100 species of caterpillars. Their daisy-like blooms in purple, blue, pink, and white create stunning fall displays that keep the garden alive with color and pollinators.
Growing Conditions
Hardiness Zones4 — 8
Height2.91m
Spread0.73m
Growth HabitForb/herb
Pollinator Valuehigh
Companion Planting & Soil
Good Companions
Soil pH5.5 — 7.5
Soil TypeAverage, well-drained soil; adaptable to many conditions
Planting Calendar
When to sow, transplant, and harvest by growing zone.
| Zone | Action | Months | Notes |
|---|---|---|---|
| Cold (1-2) | Transplant | May — Jun | Plant in spring; perennial to zone 3; pinch in June for compact habit |
| Cold (1-2) | Harvest | Aug — Oct | Blooms late summer through fall; excellent cut flower |
| Cool (3-4) | Transplant | Apr — May | Plant in spring; divide every 2-3 years to maintain vigor |
| Cool (3-4) | Harvest | Aug — Oct | Fall blooms; essential food for late-season pollinators |
| Moderate (5-7) | Transplant | Mar — Apr | Plant in early spring; critical late-season pollinator plant |
| Moderate (5-7) | Harvest | Sep — Nov | Peak bloom in fall |
| Moderate (5-7) | Divide | Mar — Apr | Divide every 2-3 years in spring; discard woody center |
| Warm (8-9) | Transplant | Feb — Mar | Plant in late winter/spring |
| Warm (8-9) | Harvest | Sep — Nov | Fall bloom; deadhead for extended flowering |
| Hot (10+) | Transplant | Nov — Dec | Plant in fall; may struggle in extreme heat |
| Hot (10+) | Harvest | Oct — Dec | Late fall/early winter bloom |
Uses
Other Uses
- Critical late-season pollinator food source
- Native habitat restoration plantings
- Cut flowers for fall arrangements
