Poorland Flatsedge
Cyperus compressus
Last reviewed: October 2026
Toxicity unknown
Poorland Flatsedge (Cyperus compressus) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
The USDA PLANTS Database (opens in new tab) does not flag Poorland Flatsedge as toxic to livestock.
Light
full sun
Water
low
Size
4"–16" H × 2"–8" W
Bloom
Jun, Jul, Aug, Sep, Oct
Native to
AL, AR, FL, GA and 14 more states
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 459 programs across 44 states, each with a link to the provider and the date we last checked it.
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Browse plants for this ecoregion
Poorland flatsedge is a low-growing annual sedge with narrow, grass-like leaves and small clusters of brownish flowers from summer through fall. This compact native thrives in sunny, dry conditions and poor soils where other plants struggle. It naturally reseeds each year, creating a fine-textured groundcover.
In an HOA neighborhood
Poorland 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.
- Annual growth means gaps in coverage
- Can appear weedy or unkempt
- Name includes 'poorland' which suggests weedy nature
Wildlife value
This sedge provides seeds for small birds and supports various insects, though it's not a major pollinator plant. Its dense growth offers shelter for ground-dwelling beneficial insects.
Common questions
- How much sun does Poorland Flatsedge need?
- Poorland Flatsedge grows best in full sun conditions.
- When does Poorland Flatsedge bloom?
- Poorland Flatsedge blooms in June, July, August, September, and October.
- Where is Poorland Flatsedge native?
- Poorland Flatsedge (Cyperus compressus) is native to AL, AR, FL, GA and 14 more states, per vouchered herbarium specimen records and regional native plant society lists.
- Is Poorland Flatsedge toxic to livestock?
- The USDA PLANTS Database does not flag Poorland Flatsedge as toxic to livestock.
- Is Poorland Flatsedge HOA-friendly?
- Poorland 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 vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow Poorland Flatsedge? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.