North America Native Plant

Siskiyou Fleabane

Botanical name: Erigeron cervinus

USDA symbol: ERCE

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Erigeron delicatus Cronquist (ERDE4)   

Siskiyou Fleabane: A Rare Native Gem for Your Mountain Garden If you’re looking to add a touch of wild mountain beauty to your garden while supporting local ecosystems, Siskiyou fleabane (Erigeron cervinus) might just be the perfect native perennial for you. This charming little wildflower brings the rugged elegance of ...

Rare plant alert!

Region: Conservation status by state

Status: S3: Status is uncertain but is somewhere between the following rankings: Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Siskiyou Fleabane: A Rare Native Gem for Your Mountain Garden

If you’re looking to add a touch of wild mountain beauty to your garden while supporting local ecosystems, Siskiyou fleabane (Erigeron cervinus) might just be the perfect native perennial for you. This charming little wildflower brings the rugged elegance of the Siskiyou Mountains right to your backyard, but there’s an important catch every responsible gardener should know about.

What Makes Siskiyou Fleabane Special?

Siskiyou fleabane is a delightful native perennial that produces clusters of small, daisy-like flowers with crisp white to pale pink petals surrounding cheerful yellow centers. As a member of the aster family, this herbaceous forb (that’s botanist-speak for a non-woody flowering plant) creates a low-growing carpet of blooms that’s absolutely irresistible to pollinators.

Don’t let the name fleabane fool you – while historically some plants in this genus were thought to repel fleas, this beauty is all about attracting the good guys like native bees, butterflies, and other beneficial insects to your garden.

Where Does Siskiyou Fleabane Call Home?

This special native is endemic to a relatively small region spanning southern Oregon and northern California, primarily in the Siskiyou Mountains. It’s one of those plants that really knows where it belongs – specifically in the rocky, well-draining soils of its mountainous homeland.

A Word of Caution: This Plant Is Rare

Here’s where things get serious, fellow gardeners. Siskiyou fleabane has a Global Conservation Status of S3, which means it’s considered vulnerable in the wild. With only an estimated 21 to 100 occurrences and between 3,000 to 10,000 individual plants remaining in nature, this little beauty is facing some real challenges in its native habitat.

What this means for you: If you’re interested in growing Siskiyou fleabane, please – and we cannot stress this enough – only purchase plants or seeds from reputable nurseries that ethically propagate their stock. Never collect plants or seeds from wild populations. This plant’s rarity makes responsible sourcing absolutely critical.

Perfect Garden Spots for Siskiyou Fleabane

This mountain native is tailor-made for:

  • Rock gardens where it can nestle between stones
  • Alpine or mountain-themed landscapes
  • Native plant gardens celebrating regional flora
  • Xeriscaped areas that need low-water options
  • Areas where you want to create habitat for native pollinators

Growing Conditions That Make It Happy

Think mountain meadow when planning where to plant your Siskiyou fleabane:

  • Sunlight: Full sun to partial shade (morning sun is particularly appreciated)
  • Soil: Well-draining, rocky, or sandy soil – absolutely no soggy feet!
  • Water: Drought tolerant once established, but appreciates occasional deep watering during dry spells
  • Climate: Thrives in USDA hardiness zones 5-8

Planting and Care Tips

The good news? Once you’ve sourced your Siskiyou fleabane responsibly, it’s refreshingly low-maintenance:

  • Plant in spring or early fall when temperatures are moderate
  • Amend heavy clay soils with sand, gravel, or pumice to improve drainage
  • Water regularly the first year to help establish roots, then back off
  • Avoid fertilizing – this plant prefers lean, natural soils
  • Deadhead spent flowers to encourage more blooms (though leave some for seed production)
  • Mulch lightly with gravel rather than organic mulch to prevent crown rot

Why Your Garden (and Local Wildlife) Will Thank You

By choosing to grow Siskiyou fleabane responsibly, you’re not just adding a beautiful native plant to your landscape – you’re creating a little oasis for native pollinators who have co-evolved with this species. Native bees, butterflies, and other beneficial insects rely on plants like this for nectar and pollen, and your garden becomes part of a larger conservation effort.

Plus, there’s something deeply satisfying about growing a plant that truly belongs in your region. Siskiyou fleabane has spent thousands of years adapting to local conditions, which means it’s naturally suited to thrive in regional climate patterns once established.

The Bottom Line

Siskiyou fleabane is a wonderful choice for gardeners in its native range who want to support local ecosystems while enjoying a charming, low-maintenance perennial. Just remember: with great beauty comes great responsibility. Always source this rare plant ethically, and consider yourself a conservation partner in keeping this mountain treasure thriving for future generations to enjoy.

Your mountain garden – and the native pollinators who visit it – will absolutely love this special native gem.

Siskiyou Fleabane

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Erigeron L. - fleabane

Species

Erigeron cervinus Greene - Siskiyou fleabane

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