Eleocharis obtusa
blunt spikerush

Characteristics

Descriptions

Light Requirements

sun, part-sun

Soil Moisture

moist, wet

Soil Description

acid, neutral, alkaline, average, clay, sand, gravel/rock

Height

10"-18"

Bloom Time

June, July, August, September

Bloom Color

yellow

Hardiness Zone

3, 4, 5, 6, 7, 8, 9

More Filters

food for birds, colonizing, emergent, ornamental foliage, pond margin plant, stream margin plant, water garden plant

Description

Eleocharis obtusa is an attractive sedge that forms rounded clumps up to 20" tall. Though it has leaves, these are so tightly wrapped around the base of the stems (known as culms), that they are inconspicuous. Each culm is terminated by a distinctive, oval, flat-topped seed head.

Cultivation

Eleocharis obtusa is typically found growing at the edge of freshwater marshes, ponds, rivers, and in wet prairies and meadows. Although it is occasionally found in moist open woodlands, it should be considered shade intolerant. It is well adapted to average soil, that can vary from fine textured and sandy, heavy poorly drained clay, to coarse gravelly and rocky. It is an emergent species and can withstand permanent inundation in shallow freshwater (it is not tolerant of salt). Plants can be grown in typical garden conditions, provided they are not allowed to dry out for extended periods of time. It is an annual and will not reproduce vegetatively. It self-seeds readily, without becoming aggressive, and will provide a perennial presence under optimal conditions. Flower and seed production occurs from early summer to early fall. Zones 3-9

Additional Notes

The non-aggressive nature of blunt spikerush makes it a good choice for use around small water features, ponds and in water gardens. It will not withstand competition from taller, more aggressive, perennial wetland species.
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Pricing & Availability

Pricing & Availability

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Please note, we are unable to ship to:

AZ, CA, CO, FL, ID, LA, MT, NM, NV, OR, TX, UT, WA, WY

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Maps, Wetland Status & More

MAP OF NATIVE RANGE

Recorded County Distribution: USDA data.

More Information

Native To

More Information
AL, AR, CT, DC, DE, GA, IA, IL, IN, KS, KY, MA, MD, ME, MI, MN, MO, MS, NC, NE, NH, NJ, NY, OH, OK, PA, RI, SC, SD, TN, VA, VT, WI, WV, CA, CO, FL, ID, LA, NM, NV, OR, TX, WA

Legal Status

EndangeredPA

Wetland Status

Arid WestOBL
Atlantic and Gulf Coastal PlainOBL
Eastern Mountains and PiedmontOBL
Great PlainsOBL
MidwestOBL
Northcentral and NortheastOBL
Western Mountains, Valleys, and CoastOBL

 

MAP OF WETLAND DELINEATION REGIONS

Wetland Status regions

 
Northcentral and Northeast
 
Eastern Mountains and Piedmont
 
Atlantic and Gulf Coastal Plain
 
Midwest
 
Great Plains
 
Western Mountains, Valleys, and Coast
 
Arid West

Interpreting Wetland Status

Code

Status

Designation

Comment

OBL

Obligate Wetland

Hydrophyte

Almost always occur in wetlands

FACW

Facultative Wetland

Hydrophyte

Usually occur in wetlands, but may occur in non-wetlands

FAC

Facultative

Hydrophyte

Occur in wetlands and non-wetlands

FACU

Facultative Upland

Nonhydrophyte

Usually occur in non-wetlands, but may occur in wetlands

UPL

Obligate Upland

Nonhydrophyte

Almost never occur in wetlands

Classification

KingdomPlantaePlants
SubkingdomTracheobiontaVascular plants
SuperdivisionSpermatophytaSeed plants
DivisionMagnoliophytaFlowering plants
ClassLiliopsidaMonocotyledons
SubclassCommelinidae
OrderCyperales
FamilyCyperaceaeSedge family
GenusEleocharisspikerush
SpeciesEleocharis obtusablunt spikerush

ADDITIONAL COMMON NAMES:

spike-rush

SCIENTIFIC SYNONYMS:

Scirpus obtusus

Plant Sizes

Sizes Sizes

Sizes info

Shipping & Planting

SHIPPING INFO:

Shipping is free on all plants orders!

Your plants will ship using each grower’s preferred method: FedEx Ground, UPS Ground, or Spee-Dee Ground (in select midwestern states). Our growers ship orders Monday through Wednesday. The farther your plants need to travel, the earlier in the week they will ship. The goal is to have all plants delivered by the end of the week.

 

Shipping plugs:

Plugs are shipped in full flats, sometimes also referred to as trays. Multiple flats can be shipped in a single box. The flats are wrapped in netting or craft paper to secure the plants, and spacers are used between flats to keep the plants from being crushed.

When you unpack your plugs, the plants will have been somewhat flattened by the netting or craft paper. They will straighten out within a couple of days. You may also gently “fluff” them a bit to speed up the process. In some cases, your plants might have been cut back before packing, if the grower deemed them to have become too tall for safe packaging. Don’t worry, though, these guys know what they’re doing and would not compromise the health of the plants. They’ll fill back in in no time.

After receiving your plants’ journey in a dark box, it will be important to acclimate them to sunlight again. Over a couple of days, you should gradually move them into their preferred light exposure, and water them as per their requirement.

Although we always recommend putting your plants in the ground as soon as possible, they can stay healthy in the flats for a considerable amount of time. The key is to respect their growing requirements: if the species requires full sun, do not store them in the shade. If it is best adapted to dry soil, do not over-water.

PLANTING INFO:

Planting plugs:

We consider plugs ready to ship when the plants’ roots have filled the entire liner cell and the plants can easily be pulled out. In some cases you will have to go about it gently, wiggling the plant by the crown, and possibly squeezing the bottom of the liner to compress the growing medium and release the roots. Other times, the plants will appear to be root bound. They are not in the traditional sense. The plants are healthy but they have used up all the growing medium available to them. Plugs are at an aggressive stage of growth. As soon as planted the roots will immediately expand into your native soil. They establish faster than plants in larger containers, because they don’t have the luxury of a lot of growing media that can inhibit the roots from venturing outside of their comfort zone.

We are not going to address area preparation because the process can be complex and is always site-specific. However, as a rule, we recommend disturbing the soil as little as possible, and we do not recommend amending the soil. If you chose the right plant for the right conditions they will thrive. Any disturbance and amendments will only encourage weeds to emerge that never had a chance to do so before.

Installing plugs cannot be easier: dig a hole large enough for the roots to fit snugly inside, then water them in to eliminate air gaps. We recommend using a soil knife, sometimes referred to as hori hori, or a drill-adapted auger if it’s a large installation. If you use an auger, you will need a powerful drill. Depending on the size of the project and the type of soil, the process can be beyond what an average drill will bear. Mulching is recommended after installation to help keep weeds down while the plants establish. Be sure to keep it away from the crown of the plants. For large projects, you may want to mulch the area before planting, rather than tiptoeing through it after the fact. As a side note: if you are installing plugs in the fall, you might want to plant them so that the crown is about ¾” lower than the surrounding soil. The winter’s freeze/thaw cycles can push plugs out if the roots did not have enough time to establish and anchor them in.