Slender Flatsedge
Cyperus bipartitus
Last reviewed: June 2026
The USDA PLANTS Database (opens in new tab) does not flag Slender Flatsedge as toxic to livestock.
Light
full sun
Water
medium
Size
4"–12" H × 2"–6" W
Bloom
Jun, Jul, Aug, Sep
Native to
AL, AR, AZ, CA and 41 more states
Shining flatsedge is a small annual sedge that forms compact clumps with narrow, grass-like leaves. It produces small, inconspicuous brownish flower clusters from summer through early fall. This diminutive plant works well as a filler in rock gardens or naturalized areas.
In an HOA neighborhood
Slender Flatsedge takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Grass-like appearance may be mistaken for weedy growth
- Inconspicuous flowers lack ornamental appeal
- Sedge form unfamiliar to many homeowners
Wildlife value
Provides seeds for small birds and ground-feeding wildlife. Offers minimal nectar but can support some small insects during its extended blooming period.
Common questions
- How much sun does Slender Flatsedge need?
- Slender Flatsedge grows best in full sun conditions.
- When does Slender Flatsedge bloom?
- Slender Flatsedge blooms in June, July, August, and September.
- Where is Slender Flatsedge native?
- Slender Flatsedge (Cyperus bipartitus) is native to AL, AR, AZ, CA and 41 more states, per the USDA PLANTS Database and regional native plant society lists.
- Is Slender Flatsedge toxic to livestock?
- The USDA PLANTS Database does not flag Slender Flatsedge as toxic to livestock.
- Is Slender Flatsedge HOA-friendly?
- Slender Flatsedge takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Slender Flatsedge? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz