Showy Whitetop
Rhynchospora nivea
Last reviewed: October 2026
Toxicity unknown
Showy Whitetop (Rhynchospora nivea) 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.
Light
full sun
Water
medium
Size
12"–18" H × 6"–12" W
Bloom
Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
Native to
OK, TX
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.
Find rebates in your areaPicture natives in your own yard
Upload a photo of your yard and Patch Vision shows a rendering of it planted with natives for your region, like Showy Whitetop.
Browse plants for this ecoregion
Showy Whitetop is a compact native sedge that forms neat clumps with striking white, star-shaped flower clusters that bloom for most of the growing season. This attractive perennial maintains a tidy, grass-like appearance while providing nearly continuous white blooms from spring through fall.
In an HOA neighborhood
Showy Whitetop is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, mid zone.
- Cut back in late winter
Wildlife value
The long blooming period and abundant flowers provide nectar for various small pollinators including native bees and beneficial insects. The seeds also attract small songbirds in late fall and winter.
Common questions
- How much sun does Showy Whitetop need?
- Showy Whitetop grows best in full sun conditions.
- When does Showy Whitetop bloom?
- Showy Whitetop blooms in March, April, May, June, July, August, September, October, and November.
- Where is Showy Whitetop native?
- Showy Whitetop (Rhynchospora nivea) is native to OK, TX, per vouchered herbarium specimen records and regional native plant society lists.
- Is Showy Whitetop HOA-friendly?
- Showy Whitetop is generally an HOA-friendly choice in the right placement, with low maintenance.
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 Showy Whitetop? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.