North America Native Plant

Siskiyou Phacelia

Botanical name: Phacelia leonis

USDA symbol: PHLE2

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Siskiyou Phacelia: A Rare Native Gem for Your Garden Meet the Siskiyou phacelia (Phacelia leonis), a charming little annual that’s as unique as its mountainous homeland. This delicate wildflower might not be the showiest plant in your garden, but it packs a punch when it comes to supporting local ecosystems ...

Rare plant alert!

Region: Conservation status by state

Status: S2: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

Siskiyou Phacelia: A Rare Native Gem for Your Garden

Meet the Siskiyou phacelia (Phacelia leonis), a charming little annual that’s as unique as its mountainous homeland. This delicate wildflower might not be the showiest plant in your garden, but it packs a punch when it comes to supporting local ecosystems and adding subtle beauty to native landscapes.

What Makes Siskiyou Phacelia Special?

The Siskiyou phacelia is a true native of the American West, calling the regions of California and Oregon home. As an annual forb, this herbaceous plant completes its entire life cycle in just one growing season, making it a perfect candidate for gardeners who love the excitement of seasonal change.

What really sets this plant apart is its distinctive appearance. The Siskiyou phacelia produces clusters of small, bell-shaped flowers in lovely shades of lavender to purple. These blooms arrange themselves in characteristic coiled clusters that gradually unfurl as the flowers open – it’s like nature’s own spiral staircase! The deeply lobed, hairy leaves add texture and interest even when the plant isn’t in bloom.

Where Does It Naturally Grow?

This special phacelia is native to southwestern Oregon and northwestern California, with most populations concentrated in the Siskiyou Mountains region. It’s perfectly adapted to the Mediterranean climate of the Pacific Northwest, thriving in areas with wet winters and dry summers.

Important Conservation Note

Here’s something crucial every gardener should know: Siskiyou phacelia has a Global Conservation Status of S2, meaning it’s considered imperiled in the wild. With typically only 6 to 20 known occurrences and few remaining individuals, this plant is quite rare. If you’re interested in growing it, please make sure you source seeds or plants only from reputable native plant nurseries that collect responsibly and don’t impact wild populations.

Why Plant Siskiyou Phacelia in Your Garden?

Despite its rarity in the wild, there are several compelling reasons to consider adding this native beauty to your landscape:

  • Pollinator magnet: The flowers are excellent for attracting native bees, butterflies, and other beneficial insects
  • True native: Supporting local ecosystems by growing plants that evolved in your region
  • Low maintenance: Once established, it requires minimal care and water
  • Unique texture: The hairy, lobed leaves add interesting texture to wildflower gardens
  • Conservation impact: Growing it responsibly can help preserve genetic diversity

Perfect Garden Settings

Siskiyou phacelia shines brightest in:

  • Native plant gardens
  • Wildflower meadows and naturalized areas
  • Rock gardens with good drainage
  • Mediterranean-style landscapes
  • Pollinator gardens focused on native species

Growing Conditions and Care

This mountain native is surprisingly adaptable but does best when you mimic its natural habitat:

Climate: Hardy in USDA zones 8-10, where it can handle the mild winters and warm, dry summers it’s accustomed to.

Light: Partial shade to full sun – it’s quite flexible but appreciates some afternoon shade in hot climates.

Soil: Well-draining soil is absolutely essential. This plant evolved in rocky, mountainous terrain and doesn’t appreciate soggy conditions.

Water: Once established, it’s quite drought-tolerant. Water regularly during germination and early growth, then reduce watering as the plant matures.

Planting and Care Tips

Growing Siskiyou phacelia is straightforward once you understand its needs:

  • Timing: Direct sow seeds in fall or early spring when soil temperatures are cool
  • Soil prep: Ensure excellent drainage – amend heavy soils with sand or gravel if needed
  • Seeding: Scatter seeds lightly on the soil surface; they need light to germinate
  • Germination: Keep soil consistently moist until seedlings are established
  • Maintenance: Once growing, this plant pretty much takes care of itself

A Final Word on Responsible Growing

The Siskiyou phacelia represents something special – a chance to grow a truly rare native plant while contributing to conservation efforts. By choosing to grow this imperiled species, you’re helping preserve its genetic diversity and providing habitat for the pollinators that depend on it. Just remember to source your seeds or plants responsibly from conservation-minded nurseries, and never collect from wild populations.

In a world where many gardens are filled with plants from far-off places, there’s something deeply satisfying about nurturing a piece of your local natural heritage. The Siskiyou phacelia might be small, but its impact on your local ecosystem – and your gardening soul – can be mighty indeed.

Siskiyou Phacelia

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

Solanales

Family

Hydrophyllaceae R. Br. - Waterleaf family

Genus

Phacelia Juss. - phacelia

Species

Phacelia leonis J.T. Howell - Siskiyou phacelia

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