Blunt Spike Rush

About Blunt Spike Rush

Blunt Spike Rush (Eleocharis obtusa) is a charming, short-statured annual spikesedge that excels at colonizing muddy shorelines and temporary wetlands. Typically reaching heights of 6 to 18 inches, this plant grows in tidy, bright green clumps of leafless stems. Native across nearly all of North America, it is a pioneer species that quickly establishes itself in disturbed wet areas like ditches and pond edges. The name 'blunt' refers to its rounded, egg-shaped spikelets that appear at the stem tips from early summer through fall. These seed heads are a valuable food source for ducks and other shorebirds, while the dense foliage provides shelter for frogs and dragonflies. Although it is an annual, it is a prolific self-seeder, ensuring a reliable return each year. It prefers full sun and consistently wet conditions, including mud or shallow water. Seeds benefit from late fall sowing or 60 days of cold, moist stratification.