Cyperaceae
Threeway sedge
Dulichium arundinaceum
Also known as Dulichium arundinaceum, Three-way sedge, Cyperus arundinaceus, Dulichium
Zones 4–9Sun Partial SunWater ModerateCare Moderate
Native Plants · Wetland · Sedge · Pond · Rain-Garden · Architectural · Waterfowl · Wet-Soil · Vertical
Pet-safeAttracts pollinators
Currently out of stock everywhereStock updated 9/6/2026
Threeway sedge is an excellent choice for wetland gardens, pond edges, and rain gardens. It thrives in consistently moist to wet soils and provides important habitat for waterfowl. This architectural sedge adds vertical interest with its distinctive three-ranked stem arrangement.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Keep soil consistently moist to wet, tolerates standing water · Every 5-7 days
- Maintenance
- Moderate
- Soil
- loam
- Soil pH
- 4.7–7.5
- Temperature
- -30°F to 95°F
- Cycle
- Perennial
- Propagation
- Seed
Hardiness
USDA 4a-9b
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Form & growth
Mature size and habit
- Mature height
- 12 in – 2.5 ft
- Spread
- 18 in
- Spacing
- 12 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- No
- Foliage
- Green · Fine
Ecology & origin
Where it belongs and what it brings
- Native to
- Alabama, Arkansas, British Columbia, California, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Manitoba, Maryland, Masachusettes, Michigan, Minnesota
- Attracts
- Birds
Sources: trefle, usda
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