North America Native Plant

Strict Blue-eyed Grass

Botanical name: Sisyrinchium montanum

USDA symbol: SIMO2

Life cycle: perennial

Habit: forb

Native status: Native to Canada âš˜ Native to the lower 48 states âš˜ Native to St. Pierre and Miquelon  

Strict Blue-Eyed Grass: A Charming Native Wildflower for Every Garden If you’re looking for a delicate native wildflower that packs a punch without taking over your garden, meet strict blue-eyed grass (Sisyrinchium montanum). Don’t let the name fool you—this little beauty isn’t actually a grass at all! It’s a charming ...

Strict Blue-Eyed Grass: A Charming Native Wildflower for Every Garden

If you’re looking for a delicate native wildflower that packs a punch without taking over your garden, meet strict blue-eyed grass (Sisyrinchium montanum). Don’t let the name fool you—this little beauty isn’t actually a grass at all! It’s a charming perennial that brings subtle elegance and important ecological benefits to gardens across North America.

What Makes Strict Blue-Eyed Grass Special?

This native North American wildflower is truly a continental treasure. Sisyrinchium montanum calls home to an impressive range spanning Canada, the lower 48 United States, and even St. Pierre and Miquelon. You’ll find it growing naturally across diverse regions from Alberta and British Columbia down to Texas and New Mexico, and from coast to coast.

The plant thrives in an remarkable variety of locations including Colorado, Idaho, Montana, all the way to Maine, Massachusetts, and Virginia, plus many states and provinces in between. This extensive natural distribution speaks to its adaptability and hardiness—qualities that make it an excellent choice for gardeners in USDA zones 2-7.

Garden Appeal and Landscape Role

Strict blue-eyed grass brings a gentle, cottage garden charm wherever it’s planted. The star-shaped flowers feature six delicate petals in shades of blue to purple, each adorned with a bright yellow center that seems to glow against the modest grass-like foliage. These blooms typically appear from late spring through early summer, creating lovely drifts of color.

As a perennial forb (that’s botanist-speak for a non-woody flowering plant), it forms low clumps that work beautifully in several garden styles:

  • Native plant and wildflower gardens
  • Rock gardens and alpine plantings
  • Prairie and meadow restorations
  • Rain gardens and naturalized landscapes
  • Groundcover for informal areas

Why Pollinators Love It

Those cheerful little flowers aren’t just pretty—they’re pollinator magnets! Small bees, butterflies, and other beneficial insects flock to the nectar-rich blooms. By planting strict blue-eyed grass, you’re essentially rolling out the welcome mat for the tiny creatures that keep our ecosystems humming.

Growing Conditions and Care

Here’s where this plant really shines: it’s refreshingly easy to please. Strict blue-eyed grass adapts to various moisture levels, which explains its interesting wetland status. Depending on your region, it can thrive in both wetland and non-wetland conditions—talk about flexibility!

For best results, provide:

  • Full sun to partial shade (though it prefers bright conditions)
  • Moist to moderately dry soils
  • Various soil types including clay, loam, or sandy soils
  • Good drainage to prevent waterlogging

Planting and Maintenance Tips

Getting started with strict blue-eyed grass couldn’t be simpler. The plant grows easily from seed and has a delightful habit of self-sowing, meaning you might find pleasant surprises popping up in other parts of your garden.

Once established, this low-maintenance native asks for very little:

  • Water during extended dry periods, especially in the first year
  • Allow it to self-seed if you want more plants
  • Don’t worry if it goes dormant during hot summers—that’s completely normal
  • No need for fertilizing; it thrives in average garden conditions

Is Strict Blue-Eyed Grass Right for Your Garden?

If you appreciate understated beauty and want to support native ecosystems, this plant deserves serious consideration. It’s perfect for gardeners who love the idea of a self-sufficient wildflower that attracts beneficial insects without aggressive spreading habits.

However, keep in mind that strict blue-eyed grass won’t give you the bold, dramatic impact of larger perennials. Its charm lies in gentle naturalization and subtle seasonal interest. If you’re looking for a showstopper centerpiece, you might want to pair it with more prominent native companions.

With its impressive cold hardiness, adaptable nature, and valuable ecosystem services, strict blue-eyed grass proves that sometimes the most unassuming plants make the biggest difference. Whether you’re creating a prairie restoration or simply want to add some native charm to a corner of your yard, this little wildflower is ready to quietly steal the show.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Alaska

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Arid West

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Eastern Mountains and Piedmont

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Great Plains

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Midwest

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Northcentral & Northeast

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Western Mountains, Valleys, and Coast

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Strict Blue-eyed Grass

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Liliidae

Order

Liliales

Family

Iridaceae Juss. - Iris family

Genus

Sisyrinchium L. - blue-eyed grass

Species

Sisyrinchium montanum Greene - strict 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