Smooth White Aster
Symphyotrichum porteri
- Native to:
- United States
Stephen Hornbeck (www.inaturalist.org)
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Asteraceae
- Genus:
- Symphyotrichum
- Species:
- Symphyotrichum porteri
- USDA Symbol:
- SYPO4
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 100 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- aug,sep,oct
- Bloom Colors:
- violet, purple, white
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Butterflies & Moths:
- ★☆☆☆☆ Documented Lepidoptera association (GBIF)
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★★☆ Butterfly & moth species supported by this genus (NWF)
- Pollen Specialist Bee Keystone:
- ★★★★☆ Native pollen specialist bee species supported by this genus (NWF)
Host Plant for Caterpillars
Arcigera Flower Moth (Schinia arcigera), clover cutworm (Agrotis gladiaria), Coleophora astericola, Coleophora ericoides, Coleophora polemoniella, Cucullia alfarata, dingy cutworm (Feltia jaculifera), Gnorimoschema subterranea, kidney-spotted minor (Lacinipolia renigera), Lacinipolia meditata, Orthodes crenulata, Pale-banded Dart (Agnorisma badinodis), Peppered Moth (Biston betularia), Pseudorthodes vecors, Wavy-lined Emerald (Synchlora aerata), Meadow Crescent (Phyciodes pratensis), Pearl Crescent (Phyciodes tharos)
Garden & Ecology Notes
- Wildlife Value:
- bees, butterflies, birds
Soil Requirements
- Soil Type:
- rocky, well-drained, nutrient-poor soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to rocky slopes and open areas
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 14–30 days
- Notes:
- Seeds benefit from cold moist stratification for 30-60 days to break dormancy.
Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).
Source: Claude AI