Hardstem Bulrush
Schoenoplectus acutus
- Native to:
- Canada, Central American Pacific Is., Mexico, Prince Edward I., Russia, United States
Gordon Leppig & Andrea J. Pickart





Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Cyperaceae
- Genus:
- Schoenoplectus
- Species:
- Schoenoplectus acutus
- USDA Symbol:
- SCAC3
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Graminoid
- Height:
- 300 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Low
- Bloom Months:
- jun,jul,aug,sep
- Bloom Colors:
- brown
Wildlife Benefits
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Host Plant for Caterpillars
Archanara subflava
Garden & Ecology Notes
- Wildlife Value:
- waterfowl, muskrats, songbirds
- Deer Resistant:
- Yes
- Salt Tolerant:
- Yes
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts vigorously from rhizomes after fire; fire can help control accumulated dead material in wetland stands.
Soil Requirements
- Soil Type:
- rich, organic, waterlogged soil
- pH:
- 5.5 - 7.5 (slightly acidic to neutral)
- Drainage:
- tolerates poor drainage
- Moisture:
- consistently moist to saturated
- Notes:
- Commonly found in marshes, swamps, and along shorelines.
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 14–30 days
- Notes:
- Seeds germinate best in saturated or shallowly flooded conditions with light exposure.
Pre-treatment: Seeds were cold stratified for 84 days.
Source: npn.rngr.net