Purplestem Aster

Symphyotrichum puniceum

Also known as: Shining Aster

Native to:
Canada, Labrador, Prince Edward I., United States

📍 View on iNaturalist →

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Asteraceae
Genus:
Symphyotrichum
Species:
Symphyotrichum puniceum
USDA Symbol:
SYPU

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb , Subshrub
Height:
250 cm
Light Requirements:
Full Sun
Drought Tolerance:
Low
Bloom Months:
aug,sep,oct,nov
Bloom Colors:
purple, lavender, blue, pink

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), Asymmetrura impositella, Impecunious Borer Moth (Papaipema impecuniosa), Lioptilodes parvus, Northern Flower Moth (Schinia septentrionalis), orange oakleaf (Charidryas nycteis), Pearl Crescent (Phyciodes tharos)

Reported Fauna Sightings

Bees: Common eastern (Bombus impatiens)

Garden & Ecology Notes

Wildlife Value:
bees, butterflies, birds
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts from rhizomes following fire; tolerates periodic burns in wetland margins.

Soil Requirements

Soil Type:
moist, rich, loamy soil
pH:
5.5 - 7.0 (slightly acidic to neutral)
Drainage:
tolerates poor drainage
Moisture:
consistently moist
Notes:
commonly found in wetlands and along streams

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Germination Time:
14–30 days
Notes:
Seeds require light for germination; surface sow and do not cover.

The above propagation data sourced from Claude AI

Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).

Source: Claude AI

ORGHPS Germination Guide: Sow @ 4C for 3 weeks, then place @ 20C.

Source: Ontario Rock Garden & Hardy Plant Society