Grassleaf Rush
Juncus marginatus
- Native to:
- Bermuda, Bolivia, Brazil, Canada, Cuba, Honduras, Jamaica, Mexico, United States
Andrés González (www.wikidata.org)






Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Juncaceae
- Genus:
- Juncus
- Species:
- Juncus marginatus
- USDA Symbol:
- JUMA4
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Graminoid
- Height:
- 80 cm
- Light Requirements:
- Part Shade
- Drought Tolerance:
- Low
- Bloom Months:
- may,jun,jul,aug,sep
- Bloom Colors:
- green, brown
Keystone Species Ranking
- Caterpillar Keystone:
- ★★☆☆☆ Butterfly & moth species supported by this genus (NWF)
Garden & Ecology Notes
- Wildlife Value:
- waterfowl, songbirds, small mammals
- Deer Resistant:
- Yes
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts from rhizomes following fire; tolerates prescribed burns in wetland management.
Soil Requirements
- Soil Type:
- wet, sandy or peaty soil
- pH:
- 4.5 - 6.5 (acidic to slightly acidic)
- Drainage:
- tolerates poor drainage
- Moisture:
- consistently moist
- Notes:
- commonly found in wetlands and marshes
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 14–30 days
- Notes:
- Seeds require light for germination; sow on surface and keep consistently moist.
The above propagation data sourced from Claude AI
Pre-treatment: Seeds were cold stratified for 100 days
Source: npn.rngr.net