Blunt Spikerush (Eleocharis obtusa)

Blunt Spikerush

Eleocharis obtusa

Blunt Spikerush is a small, clump-forming wetland plant that grows 2 to 10 inches tall, featuring slender, grass-like stems topped with rounded seed heads. It is commonly found in marshes, pond edges, and wet meadows, thriving in saturated soils. This sedge-like species plays a crucial role in stabilizing shorelines, filtering water, and providing habitat for aquatic wildlife. Its ability to tolerate standing water makes it an excellent choice for rain gardens, wetland restorations, and erosion control projects.

Characteristics

Type	Graminoid
Sun	Full Sun, Partial Sun
Soil	Clay, Loam, Sand/Gravel, Peat, Calcareous
Moisture	Wet
Average Max Height (inches)	15
Suggested Plant Spacing (inches)	6
Dominance	Medium

Range Maps

Sowing Information

Sow seed onto a firm, weed-free seedbed. Hand-broadcast seed making two perpendicular passes for even coverage. If planting a mix, broadcast the grass component first and lightly rake/drag it into the top 1/8–1/4" of soil. Next, broadcast wildflower/forb seed and press it into the soil surface (with a roller/cultipacker or the back of a rake) to ensure good seed-to-soil contact. After seeding, apply a very light layer of clean, seed-free straw (or other weed-free, site-appropriate mulch) to reduce erosion and retain moisture without smothering seedlings. A good rainfall or thorough watering will help settle seed and mulch and improve germination.

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.