Splitawn Sedge
Carex tumulicola
Last reviewed: July 2026
Carex tumulicola (Splitawn Sedge) is a native grass-like sedge found in California, Oregon, and Washington that blooms from April to June in partial sun conditions.
Splitawn Sedge (Carex tumulicola) is not on the ASPCA Animal Poison Control Center toxic plant list for dogs or cats (aspca.org (opens in new tab), last reviewed 2026-05-21). If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
part sun
Water
medium
Size
8"–24" H × 12"–24" W
Bloom
Apr, May, Jun
Native to
CA, OR, WA
Browse plants for this ecoregion
Splitawn sedge is a fine-textured, tufted, evergreen sedge with arching leaf blades that form neat mounds. It grows well in partial shade and adapts to various soil types. This native plant makes an excellent ground cover or accent plant in woodland gardens.
Growing Splitawn Sedge
Grow Splitawn Sedge in part sun and medium water. Mature plants reach 8 to 24 inches tall and spread 12 to 24 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Splitawn Sedge is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
- May need occasional trimming to maintain tidy appearance
Wildlife value
Provides habitat and cover for small wildlife and beneficial insects. The seeds offer food for birds and small mammals.
Common questions
- Where does Carex tumulicola naturally grow?
- Splitawn Sedge is native to the Pacific Coast states of California, Oregon, and Washington.
- When does Splitawn Sedge bloom?
- Carex tumulicola typically blooms from April through June, producing its characteristic split-awned flower heads.
- What growing conditions does Carex tumulicola prefer?
- This sedge tolerates a range of light conditions from full sun to partial shade and adapts to various moisture levels, though it performs well in medium water conditions.
- Is Splitawn Sedge actually a grass?
- While Carex tumulicola has a grass-like appearance and growth form, it is technically a sedge in the family Cyperaceae, not a true grass.
- Is Splitawn Sedge toxic to dogs?
- Splitawn Sedge is not on the ASPCA Animal Poison Control Center toxic plant list for dogs (aspca.org).
- Is Splitawn Sedge toxic to cats?
- Splitawn Sedge is not on the ASPCA Animal Poison Control Center toxic plant list for cats (aspca.org).
- Is Splitawn Sedge HOA-friendly?
- Splitawn Sedge is generally an HOA-friendly choice in the right placement, with low maintenance.
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 Splitawn Sedge? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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