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Eleocharis palustris (Great Spike Rush)

Eleocharis palustris (Great Spike Rush)

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Each species requires a minimum of $30 of seed to proceed with checkout.

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

Common spikerush carries a single small flower spike at the tip of each slender stem. Long rhizomes knit the shoots into colonies in marshes, wet meadows, and shallow shoreline ground.

For Eleocharis palustris, choose sun and wet soil. Recorded habitats include shores; Marshes; Wet meadows; Fens; Swales. Reported height: 4 to 40 inches.

Growth habit: forms colonies through long rhizomes. Allow space for this growth between neighboring plants over several seasons, rather than spacing only for the size of a young plant.

Plant specifications & ecological relationships

Key growing facts

Sunlight Sun
Soil moisture Wet
Height 4 to 40 inches

Native landscape companions

For full sun and wet soil, consider these native plants alongside Eleocharis palustris:

Companion plant Height
Rice Cut Grass (Leersia oryzoides) 2–3½ ft
Dark-green Bulrush (Scirpus atrovirens) About 2½–4 ft
Water Horehound, American Bugleweed (Lycopus americanus) About 1-3 ft
Common Boneset (Eupatorium perfoliatum) 2-4 ft

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 Forms colonies through long rhizomes
Root form Rhizomes
Soil pH 4.0–8.0
Drought tolerance Low
Salt tolerance Low

Plant identification & seed reference

Botanical name Eleocharis palustris
Other common names marsh spikerush
Seed germination USDA lists cold stratification as not required; seed-lot response may vary.
Plant family Cyperaceae

Plant characteristics

Eleocharis palustris (Great Spike Rush) can be found in all manner of wetlands. It is a rhizomnous species with round leaves. Its height is somewhat dependent on how much water the plant is growing in, but can reach up to four feet. The seeds can be quite sticky. In shallow lakes, it is found with Calmagrostis candensis, Rosa palustris, and Sagittaria latifolia. In wet prairies, it is found with Andropogon gerardii, Helianthus mollis, and Viola lanceolata. This plant is often used in aquariums.

  • Flower Time June, July
Show / hide ▾Plant communities & associates

Chicago-region plant communities

Sand Ridge Savanna, Will County (2007–2009 study). Recorded in: sedge meadow; wet sand prairie.

Sedge meadow — selected native associates: Carex buxbaumii, Calamagrostis canadensis, Verbena hastata.

Wet sand prairie — selected native associates: Spartina pectinata, Carex scoparia, Onoclea sensibilis.

These records come from sampled communities within the preserve.

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 OBL
C-value — Chicago region, Flora 2017 7
Chicago-region native — Flora 2017 Yes
Native range — U.S. states Alabama; Alaska; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming
County nativity Not yet verified; occurrence records do not establish nativity.
Show / hide ▾Pollinators & wildlifeNo verified list yet

No additional named relationships have been verified for this listing.

Show / hide ▾Frequently asked questions

What are the ideal growing conditions for Great Spike Rush?
Light: Sun. Soil moisture: Wet.

How do I germinate and establish Great Spike Rush from seed?
USDA lists cold stratification as not required; seed-lot response may vary.

Is Great Spike Rush deer and herbivore resistant?
Species-specific deer resistance has not been verified here. Even plants described as resistant may be browsed. Use physical protection where deer damage is a concern.

Show / hide ▾Sources & ecological notes

Landscape companion selection: Natural Communities compared the growing requirements shown on these species pages with selected source records: Sedge meadow — Chicago region — Will County, 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.

Will County community records: Phillippe, Marcum & Ebinger (2012), Sand Ridge Savanna vegetation, Tables 1–5. Selected species and habitat facts independently organized; no open license is asserted for the article. Sampled communities are kept separate from the preserve’s seeded field.

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: USDA Forest Service: Schoenoplectus acutus; Minnesota Wildflowers; USDA NRCS PLANTS.

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

Range data: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew; 4 June 2026 release, accessed 7 September 2026. © The Trustees of the Royal Botanic Gardens, Kew. CC BY 3.0; selected and reformatted. Kew cannot warrant the quality or accuracy of these data. This use has no Kew endorsement.

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.

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.

Seed Shipping & Care

There is a minimum order requirement of $30 for each seed species. Seed ships all year and typically ships within a week of an order being placed.

We have attempted to put together some basic information regarding native seed installation, establishment, and maintenance.  We hope you find it helpful.  If you need further assistance on native seed establishment, please schedule a free consolation call here.

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