How much sun does Puerto Rico Fimbristylis need?

Puerto Rico Fimbristylis grows best in full sun conditions.

When does Puerto Rico Fimbristylis bloom?

Puerto Rico Fimbristylis blooms in August, September, and October.

Where is Puerto Rico Fimbristylis native?

Puerto Rico Fimbristylis (Fimbristylis autumnalis) is native to AL, AR, CT, DE and 32 more states, per vouchered herbarium specimen records and regional native plant society lists.

Is Puerto Rico Fimbristylis HOA-friendly?

Puerto Rico Fimbristylis takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Puerto Rico Fimbristylis

Name: Pollinator Patch
Author: Pollinator Patch

Fimbristylis autumnalis

Last reviewed: August 2026

Toxicity unknown

Puerto Rico Fimbristylis (Fimbristylis autumnalis) 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

low

Size

4"–12" H × 2"–6" W

Bloom

Aug, Sep, Oct

Native to

AL, AR, CT, DE and 32 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 445 programs across 44 states, each with a link to the provider and the date we last checked it.

Find rebates in your area

Browse plants for this ecoregion

Central Great Plains Cross Timbers Edwards Plateau Texas Blackland Prairies East Central Texas Plains Western Gulf Coastal Plain South Central Plains Eastern Temperate Forests Ozark Highlands Central Irregular Plains Great Plains Piedmont Western Corn Belt Plains Northern Lakes and Forests North Central Hardwood Forests Driftless Area Central Corn Belt Plains Eastern Corn Belt Plains Southern Michigan/Northern Indiana Drift Plains Huron/Erie Lake Plains Northeastern Highlands Northeastern Coastal Zone Middle Atlantic Coastal Plain Northern Piedmont Southeastern Plains Blue Ridge Ridge and Valley Central Appalachians Western Allegheny Plateau Interior Plateau Interior River Valleys and Hills Mississippi Alluvial Plain Mississippi Valley Loess Plains Southern Coastal Plain Southern Florida Coastal Plain Acadian Plains and Hills Eastern Great Lakes Lowlands Atlantic Coastal Pine Barrens

Fimbristylis autumnalis is a small annual sedge that forms compact clumps of narrow, grass-like foliage. It produces inconspicuous brownish flower clusters from late summer through fall and thrives in sunny, dry conditions. This diminutive plant works well as a textural accent in rock gardens or naturalized areas.

In an HOA neighborhood

Puerto Rico Fimbristylis 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.

Very small size makes it appear sparse in formal settings
Annual lifecycle creates bare spots when plants die back
Grass-like appearance may be mistaken for weeds

Wildlife value

This sedge provides seeds for small birds and ground-foraging wildlife in fall and winter. Its small stature and brief growing season offer limited but valuable late-season resources.

Common questions

How much sun does Puerto Rico Fimbristylis need?: Puerto Rico Fimbristylis grows best in full sun conditions.
When does Puerto Rico Fimbristylis bloom?: Puerto Rico Fimbristylis blooms in August, September, and October.
Where is Puerto Rico Fimbristylis native?: Puerto Rico Fimbristylis (Fimbristylis autumnalis) is native to AL, AR, CT, DE and 32 more states, per vouchered herbarium specimen records and regional native plant society lists.
Is Puerto Rico Fimbristylis HOA-friendly?: Puerto Rico Fimbristylis 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.

Ready to grow Puerto Rico Fimbristylis? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

Add this plant to your garden

iPhone app Android app

Not sure where to start? Take the 2-minute yard quiz