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Symphyotrichum ericoides or Aster ericoides (Heath Aster)

Symphyotrichum ericoides or Aster ericoides (Heath Aster)

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Pure Live Seed

Seed is provided in Pure Live Seed (PLS) unless otherwise stated.

Pure Live Seed (PLS) expresses the viable seed content of a seed lot using its purity and germination or viability test results. It helps you compare seed lots and calculate how much bulk seed is needed to meet a specified PLS planting rate.

PLS weight and bag weight

PLS weight is not the same as the total weight of seed in a bag. For example, a lot with 80% purity and 75% viability contains 60% PLS: 80 × 75 ÷ 100 = 60. Supplying 10 lb PLS from that lot requires about 16.67 lb of bulk seed.

Use the current seed test and the stated basis of the mix specification. Germination calculations may include applicable hard or dormant seed. Seed-count estimates also require the number of seeds per pound; PLS alone does not provide a seed count.

What to check when buying a mix

Check whether each rate is stated in PLS pounds, bulk pounds, or a combination. A mix with both bases should not be described as having an all-PLS total.

PLS does not remove weed seeds or guarantee establishment. Review the seed label and analysis for weed content, and match site preparation, planting conditions and follow-up management to your project.

Sources: USDA NRCS, Understanding Pure Live Seed and The Importance of Seed Quality for Natural Resource Conservation.

Weight Conversions lbs. to oz.

0.01 pounds = 0.16 ounces

  • 0.1 pounds = 1.6 ounces
  • 0.25 pounds  = 4 ounces
  • 0.5 pounds = 8 ounces
  • 0.75 pounds = 12 ounces
  • 1.00 pounds = 16 ounces

Heath Aster (Symphyotrichum ericoides) carries masses of small white flowers late in the growing season. It suits full sun and well-drained soil on the medium-to-dry side, including lean or rocky ground. Allow space for it to naturalize in a meadow or broad border, where its fine texture can complement taller plants.

Check the product options above for the available format and quantity.

Plant specifications & ecological relationships

Key growing facts

Sunlight Full sun
Soil moisture Average to dry
Height Up to 2 ft
Bloom season Fall

Native landscape companions

For full sun and dry-mesic soil, consider these native plants alongside Symphyotrichum ericoides:

Companion plant Height
Whorled Milkweed (Asclepias verticillata) ½–2 ft
Copper-shouldered Oval Sedge (Carex bicknellii) About 1½–2½ ft
Thimbleweed (Anemone cylindrica) About 1-2 ft
White Prairie Clover (Dalea candida) About 1–2 ft in published cultivation guidance; size varies with conditions.

These landscape suggestions combine overlapping growing needs with documented plant associations. Match soil, seasonal wetness and mature spread to your site. Remnant records are described separately under Plant communities & associates.

Show / hide ▾Growing & planting details
Growth habit Bushy perennial spreading into colonies, especially on open disturbed ground
Soil pH Tolerates alkaline soil
Cultivation hardiness zones Zones 3a–9b (general cultivation guidance)
Drought tolerance Drought tolerance reported; degree is not quantified
Deer browsing White-tailed deer sometimes browse tender young growth.

Plant identification & seed reference

Botanical name Symphyotrichum ericoides
Other common names heath aster; Aster ericoides; Downy Aster; Heath Aster; White Heath Aster; White Old-Field Aster
Plant family Asteraceae

Plant characteristics

This species is planned to be ready in July or August.

Heath Aster can be found in prairies and savannas in mesic to dry soils. It explodes into clouds of tiny white flowers all along its stems in August and blooms into October. Heath Aster has needle-like foliage and a bushy to sprawling habit. Asters are key pollinator plants that provide a welcome source of late-season nectar. Numerous moths use them as larval hosts.

  • Flower Color White
  • Flower Time August, September, October
  • Show / hide ▾Plant communities & associates

    Documented Illinois communities

    Mature dry sand prairie — burned

    Lost Mound — Jo Daviess County, Illinois; 2005 survey.

    Other native plants recorded in this survey area: Amorpha canescens, Andropogon gerardii, Anemone cylindrica, Asclepias verticillata, Asclepias viridiflora, Bouteloua curtipendula, Bouteloua hirsuta, Ceanothus americanus, Coreopsis palmata, Dalea purpurea, Eragrostis spectabilis, Helianthus occidentalis.

    Selected species from the ground layer. The survey includes disturbance and succession; these records do not specify immediate neighbors or planting proportions.

    Late-successional dry sand prairie

    Ayers Sand Prairie Nature Preserve — Carroll County, Illinois; 2004 survey.

    Other native plants recorded in this survey area: Asclepias verticillata, Eragrostis spectabilis, Euphorbia corollata, Koeleria macrantha, Lespedeza capitata, Liatris aspera, Panicum virgatum, Schizachyrium scoparium, Solidago nemoralis, Viola pedata, Ambrosia psilostachya, Aristida tuberculosa.

    Selected species from the ground layer. The survey includes disturbance and succession; these records do not specify immediate neighbors or planting proportions.

    Mature dry sand prairie — unburned

    Lost Mound — Jo Daviess County, Illinois; 2005 survey.

    Other native plants recorded in this survey area: Andropogon gerardii, Asclepias verticillata, Bouteloua hirsuta, Koeleria macrantha, Liatris aspera, Monarda punctata, Panicum virgatum, Rhus aromatica, Schizachyrium scoparium, Solidago nemoralis, Sorghastrum nutans, Ambrosia psilostachya.

    Selected species from the ground layer. The survey includes disturbance and succession; these records do not specify immediate neighbors or planting proportions.

    Illinois plant communities

    Mesic black-soil prairie — central Illinois

    Recorded at Loda Cemetery Prairie (Iroquois County), Prospect Cemetery Prairie (Ford County), Weston Cemetery Prairie (McLean County). INHS identifies these sites as remnants of this community.

    Selected native plants from the same remnant records:

    These inventories include edges and disturbed patches. Shared remnant records do not establish that every plant grows together in one microsite.

    Other regional plant communities

    These plants are named with this species in published vegetation accounts. Each list keeps its community and region; some records describe a shared vegetation type rather than neighboring plants in a measured plot. They are ecological records, not a planting recipe, and may include plants unsuitable for a particular garden.

    Show / hide ▾Native range & C-value

    State nativity describes a broad range. Use the Chicago-region assessment for local context; a state listing does not establish county nativity.

    Wetland indicator — NWPL 2022 Midwest FACU
    C-value — Chicago region, Flora 2017 6
    Chicago-region native — Flora 2017 Yes
    Native range — U.S. states Arizona; Arkansas; Colorado; Connecticut; Delaware; Idaho; Illinois; Indiana; Iowa; Kansas; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; New Jersey; New Mexico; New York; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Dakota; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming
    County nativity Not yet verified; occurrence records do not establish nativity.
    Show / hide ▾Pollinators & wildlife

    Bees & other flower visitors

    USGS observations recorded the following insects visiting flowers of this plant in North Dakota, South Dakota. The records describe visits, without distinguishing pollen collection from nectar feeding or measuring successful pollination. They do not establish local occurrence, exclusive dependence, or a larval-host relationship.

    Bees

    • Apis mellifera (honey bee) — North Dakota, South Dakota; 2014, 2016.
    • Melissodes trinodis — North Dakota; 2016.

    Caterpillars & other plant-feeding insects

    This plant has published caterpillar host records for the butterflies and moths listed below. These are larval feeding relationships, separate from adult nectar visits. The records span a North American literature compilation and do not establish that every insect occurs locally or uses only this plant.

    Moths

    • Coleophora astericola
    • Coleophora ericoides
    • Gnorimoschema subterranea
    • Schinia arcigera — Arcigera Flower Moth
    Show / hide ▾Frequently asked questions

    What are the ideal growing conditions for Heath Aster?
    Light: Full sun. Soil moisture: Average to dry.

    Is Heath Aster deer and herbivore resistant?
    White-tailed deer sometimes browse tender young growth. Even plants described as resistant may be browsed. Use physical protection where deer damage is a concern.

    When should I expect Heath Aster to bloom?
    Typical flowering period: Fall. Timing varies with location and weather.

    Show / hide ▾Sources & ecological notes

    Landscape companion selection: Natural Communities compared the growing requirements shown on these species pages with selected source records: Mature dry sand prairie — unburned — Northwestern Illinois — Mississippi River sand deposits; Mesic black-soil prairie — Loda Cemetery Prairie — Central Illinois. The shortlist is a planting-design inference. A shared record does not establish adjacency, identical soil requirements, local seed origin, or a tested planting combination. Regional synthesis records retain their documented focal-to-associate scope.

    Illinois communities & local records: INHS: Loda, Prospect and Weston prairie records.

    Native range & ecological ratings: Flora of the Chicago Region (2017), via Universal FQA; Kew WCVP / Plants of the World Online; USACE Chicago FQA (2017); USACE National Wetland Plant List.

    Growing conditions & other references: Illinois Wildflowers, John Hilty; USDA Forest Service: Liatris punctata; USDA Forest Service: species review; NC State Extension Plant Toolbox.

    Wildlife records: Shropshire & Tallamy: caterpillar hosts (2025); USGS Pollinator Library.

    Native range does not identify the origin of the seed or plants offered. Community and wildlife records apply to the locations and conditions described.

    Research notes & credits

    Caterpillar host records: Shropshire, K.J. & Tallamy, D.W. (2025), Lepidoptera of North America, Supplement 1. Contains information from this database made available under the Open Database License (ODbL 1.0). Natural Communities selected species-level records and screened source qualifications. The complete selection and transformation instructions for this page are available below under the same license.

    State nativity: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew, 4 June 2026 release; taxon Symphyotrichum ericoides. © The Trustees of the Royal Botanic Gardens, Kew. CC BY 3.0; selected and reformatted. Only records marked native, not extinct and not doubtful are included. Kew cannot warrant the quality or accuracy of these data; no Kew endorsement is implied.

    USACE/ERDC fqadata — Chicago Region FQA 2017. Herman, B., Sliwinski, R. & Whitaker, S. (2017), Chicago Region FQA Calculator; distributed by USACE/ERDC in fqadata under CC0. Values may differ from Flora of the Chicago Region (2017). CC0 dedication. Retained for comparison; the displayed C-value follows Flora database 80.

    Flora rating attribution: Kenneth Johnson (2018), Flora of the Chicago Region UFQA Database, following Gerould Wilhelm and Laura Rericha (2017), Flora of the Chicago Region: A Floristic and Ecological Synthesis. Individual rating facts are presented with original commentary; the calculator’s software license is not treated as a license for the underlying Flora publication.

    Caterpillar research records

    Plant: Symphyotrichum ericoides

    Record scope: Host literature synthesis; no county nativity or local insect occurrence inferred.

    Shropshire & Tallamy (2025) · Original research dataset · Reuse license: ODbL-1.0

    Plant names in the source Source insect record IDs
    Symphyotrichum ericoides 203145, 203187, 206430, 211181

    How these records were selected

    To reproduce this selection, use the “UDELep May 2025” worksheet in the original research dataset.

    1. Match the insect record IDs above to column A (UDLepID). Within each table row, pair every listed insect ID with every listed source plant name.
    2. Use the first two words in column H for the insect’s scientific name, column E for its common name, and column AB for its source category.
    3. Treat the selected pairs as reported caterpillar host records. Keep all other source fields unchanged and outside this selected table. Include no other rows or host pairs.
    4. Group butterflies and skippers together, and the other categories as moths. Retain the source’s exotic-category labels and sort display names by scientific insect name.

    Survey communities: Ebinger et al. (2006), Tables 1–12, Illinois Natural History Survey Bulletin. CC BY 4.0; adapted as dated presence lists, with the source’s non-native records excluded from the displayed native lists.

    Growing guidance: Illinois Extension — Keeping deer out of the yard and garden. Selected facts in original wording. General deer advice is not a species resistance rating.

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