Native Plants

Coastal Plain Blue-eyed Grass

Sisyrinchium fuscatum

USDA symbol: SIFU2

perennial forb

Canada: native
Lower 48 states: native

Meet one of nature’s most charming little wildflowers: coastal plain blue-eyed grass (Sisyrinchium fuscatum). Despite its common name, this delightful plant isn’t actually a grass at all – it’s a member of the iris family that just happens to sport grass-like leaves. With its tiny blue flowers and unassuming presence, ...

Coastal Plain Blue-eyed Grass may be listed as rare in your area.
New Jersey

Status: Highlands Listed, S1? | Critically imperiled: Typically 5 or fewer occurrences or under 1,000 remaining individuals.

Coastal Plain Blue-Eyed Grass: A Delicate Native Gem for Your Garden

Meet one of nature’s most charming little wildflowers: coastal plain blue-eyed grass (Sisyrinchium fuscatum). Despite its common name, this delightful plant isn’t actually a grass at all – it’s a member of the iris family that just happens to sport grass-like leaves. With its tiny blue flowers and unassuming presence, this native perennial might just be the perfect addition to your naturalistic garden.

What Makes This Plant Special

Coastal plain blue-eyed grass is a true North American native, naturally occurring from Nova Scotia down to Florida and west to Louisiana. You’ll find it growing wild in states including Alabama, Connecticut, Florida, Georgia, Louisiana, Maryland, Massachusetts, Mississippi, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, South Carolina, and Virginia.

  • Species observed
  • No observations

This perennial forb (that’s botanical speak for a non-woody herbaceous plant) forms small clumps of narrow, grass-like foliage topped with delicate six-petaled flowers. The blooms are typically a lovely shade of blue with bright yellow centers, creating tiny starbursts of color that seem to wink at you from the garden.

A Conservation Success Story in Your Garden

Important note for New Jersey gardeners: This species has a rarity status of S1? in New Jersey, meaning it’s extremely rare in the state. If you’re considering adding it to your garden, please ensure you source plants or seeds from reputable native plant nurseries that use responsibly collected material – never harvest from wild populations.

Why Gardeners Love Coastal Plain Blue-Eyed Grass

There are several compelling reasons to consider this native beauty for your landscape:

  • Pollinator magnet: The small flowers attract bees, flies, and other beneficial insects
  • Low maintenance: Once established, it’s quite drought tolerant
  • Natural look: Perfect for meadow gardens and naturalized areas
  • Native credentials: Supports local ecosystems and wildlife
  • Compact size: Won’t overwhelm smaller garden spaces

Growing Conditions and Care

Coastal plain blue-eyed grass is surprisingly adaptable, thriving in USDA hardiness zones 4-9. Here’s what this little charmer prefers:

  • Sunlight: Full sun to partial shade
  • Soil: Sandy, well-drained soils (it particularly loves sandy coastal conditions)
  • Moisture: While it can handle some moisture variation, it generally prefers drier conditions
  • pH: Adaptable to various soil pH levels

Wetland Preferences by Region

Interestingly, this plant’s relationship with moisture varies by geographic region. In the Atlantic and Gulf Coastal Plain, it’s considered an obligate upland species, almost never found in wetlands. However, in the Eastern Mountains and Piedmont, Midwest, and Northcentral & Northeast regions, it’s classified as facultative upland, meaning it usually grows in non-wetland areas but can occasionally tolerate wetter conditions.

Planting and Care Tips

Getting started with coastal plain blue-eyed grass is refreshingly straightforward:

  • Planting: Spring or fall are ideal planting times
  • Spacing: Allow 6-12 inches between plants
  • Watering: Water regularly until established, then reduce frequency
  • Maintenance: Minimal care needed once established
  • Self-seeding: May self-seed in favorable conditions, creating natural colonies

Perfect Garden Companions

This plant shines in naturalistic settings alongside other native species. Consider pairing it with native sedges, wild bergamot, or native asters for a truly authentic meadow feel. It’s also wonderful in rain gardens (depending on your region’s wetland classification) and coastal gardens where its sandy soil preferences make it a natural fit.

The Bottom Line

Coastal plain blue-eyed grass offers gardeners a chance to grow a truly special native plant that supports local ecosystems while adding subtle beauty to the landscape. Its low-maintenance nature and pollinator benefits make it an excellent choice for eco-conscious gardeners. Just remember to source your plants responsibly, especially if you’re in areas where it’s considered rare, and you’ll be contributing to conservation efforts while enjoying this delicate native treasure in your own backyard.

Sisyrinchium fuscatum is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Sisyrinchium fuscatum is also known as:

Sisyrinchium arenicola | USDA symbol: SIAR2
Sisyrinchium incrustatum | USDA symbol: SIIN16
Sisyrinchium rufipes | USDA symbol: SIRU4

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Monocot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Liliopsida - Monocotyledons
Subclass: Liliidae
Order: Liliales
Family: Iridaceae Juss. - Iris family
Genus: Sisyrinchium L. - blue-eyed grass

Species: Sisyrinchium fuscatum E.P. Bicknell - coastal plain blue-eyed grass

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA