Native Plants

Muir’s Fleabane

Erigeron muirii

USDA symbol: ERMU8

perennial forb

Alaska: native

If you’re looking for a truly unique native wildflower that can handle the harshest conditions Mother Nature throws its way, meet Muir’s fleabane (Erigeron muirii). This charming little perennial is as tough as they come, but it’s also quite rare—which makes it both exciting and important to grow responsibly. Muir’s ...

Muir’s Fleabane may be listed as rare in your area.
Global Conservation Status

Status: S2S3 | Vulnerable: Found only in a restricted range (even if abundant at some locations). Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals.

Muir’s Fleabane: A Rare Alaskan Alpine Beauty Worth Growing Responsibly

If you’re looking for a truly unique native wildflower that can handle the harshest conditions Mother Nature throws its way, meet Muir’s fleabane (Erigeron muirii). This charming little perennial is as tough as they come, but it’s also quite rare—which makes it both exciting and important to grow responsibly.

What Makes Muir’s Fleabane Special?

Muir’s fleabane is a delightful forb that produces classic daisy-like flowers with crisp white to pale pink petals surrounding sunny yellow centers. Each bloom typically measures 1-2 inches across, creating a cheerful display during the summer months. As a perennial, this hardy little plant will return year after year, slowly establishing itself in the right conditions.

Don’t let the name fleabane put you off—it’s an old-fashioned term that has nothing to do with the plant’s garden appeal! This member of the aster family is actually quite lovely and well-behaved in the garden.

Where Does It Come From?

Muir’s fleabane is native exclusively to Alaska, where it thrives in alpine and subalpine environments. You won’t find this plant growing naturally anywhere else in the world, making it a true Alaskan treasure. It has adapted to some of the most challenging growing conditions on Earth, from intense cold to short growing seasons.

  • Species observed
  • No observations

A Word About Rarity

Here’s something important to know: Muir’s fleabane has a Global Conservation Status of S2S3, meaning it’s considered vulnerable to imperiled in the wild. This doesn’t mean you shouldn’t grow it—quite the opposite! Cultivating rare native plants in gardens can help preserve them for future generations. However, it does mean you should only source this plant from reputable nurseries that propagate it responsibly, never from wild collection.

Why Grow Muir’s Fleabane?

If you’re up for the challenge, Muir’s fleabane offers several compelling reasons to earn a spot in your garden:

  • Extremely cold hardy (USDA zones 2-5), perfect for northern gardeners
  • Attracts native pollinators including small bees, flies, and butterflies
  • Adds authentic alpine character to rock gardens and naturalized areas
  • Helps preserve a rare native species through cultivation
  • Requires minimal maintenance once established

Best Garden Settings

Muir’s fleabane isn’t a plant for every garden, but it shines in the right settings:

  • Rock gardens: Perfect for alpine-style rock gardens where drainage is excellent
  • Native plant gardens: Ideal for collectors of rare native species
  • Xerophytic landscapes: Great for low-water, naturalized areas
  • Specialized collections: A must-have for serious wildflower enthusiasts

Growing Conditions and Care

Success with Muir’s fleabane comes down to mimicking its natural alpine habitat:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soil is absolutely essential—think rocky, gravelly, or sandy
  • Water: Low to moderate moisture; avoid wet, soggy conditions
  • Temperature: Thrives in cool conditions and extreme cold
  • Hardiness: Zones 2-5 (can handle temperatures well below zero)

Planting and Care Tips

Growing Muir’s fleabane successfully requires attention to its specialized needs:

  • Plant in spring after last frost, or start from seed in fall
  • Ensure excellent drainage—consider raised beds or slopes if your soil holds water
  • Mulch lightly with gravel or small stones rather than organic mulch
  • Water sparingly; this plant prefers drier conditions once established
  • In warmer zones, provide afternoon shade and extra protection
  • Allow natural winter dormancy—don’t try to keep it growing year-round

Pollinator and Wildlife Benefits

While Muir’s fleabane may be rare, it still provides valuable resources for wildlife. Its daisy-like flowers attract small native bees, beneficial flies, and butterflies that are adapted to alpine environments. By growing this plant, you’re supporting pollinators that might otherwise have limited food sources, especially in northern regions.

Is Muir’s Fleabane Right for Your Garden?

This isn’t a plant for beginning gardeners or those looking for instant gratification. Muir’s fleabane requires specific conditions and patience to establish. However, if you’re an experienced gardener with the right growing conditions and a passion for preserving rare native plants, it can be an incredibly rewarding addition to your garden.

Remember to source your plants responsibly from nurseries that propagate rather than wild-collect, and consider it an honor to help preserve this unique piece of Alaska’s natural heritage in your own backyard.

Erigeron muirii 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. Erigeron muirii is also known as:

Erigeron grandiflorus ssp. muirii Hultén | USDA symbol: ERGRM2

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: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Asterales
Family: Asteraceae Bercht. & J. Presl - Aster family
Genus: Erigeron L. - fleabane

Species: Erigeron muirii A. Gray - Muir's fleabane

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