North America Native Plant

Congdon’s Phacelia

Botanical name: Phacelia congdonii

USDA symbol: PHCO18

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Phacelia divaricata (Benth.) A. Gray var. congdonii (Greene) Munz (PHDIC)   

Congdon’s Phacelia: A Charming California Native for Your Wildflower Garden If you’re looking to add a splash of delicate blue-purple blooms to your California native garden, Congdon’s phacelia (Phacelia congdonii) might just be the perfect annual wildflower you’ve been seeking. This charming little forb brings both beauty and ecological value ...

Rare plant alert!

Region: Conservation status by state

Status: S3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ 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 ⚘

Congdon’s Phacelia: A Charming California Native for Your Wildflower Garden

If you’re looking to add a splash of delicate blue-purple blooms to your California native garden, Congdon’s phacelia (Phacelia congdonii) might just be the perfect annual wildflower you’ve been seeking. This charming little forb brings both beauty and ecological value to naturalized landscapes, making it a wonderful choice for gardeners who want to support local wildlife while enjoying lovely seasonal color.

What Makes Congdon’s Phacelia Special

Congdon’s phacelia is a true California native, found naturally in the Sierra Nevada foothills and surrounding regions. As an annual forb, it completes its entire life cycle in one growing season, producing those characteristic coiled flower clusters that make the Phacelia genus so recognizable. The small, bell-shaped flowers typically display beautiful shades of blue to purple, creating a soft, naturalistic appearance that’s perfect for wildflower meadows and native plant gardens.

Where You’ll Find This Native Beauty

This special wildflower calls California home, where it has adapted to the state’s unique Mediterranean climate and diverse growing conditions. Its natural range includes foothill regions where it has evolved alongside other native species to create the complex ecosystems that California is famous for.

Why Gardeners Love Congdon’s Phacelia

There are several compelling reasons to consider adding this native annual to your landscape:

  • Pollinator magnet: The flowers attract native bees, butterflies, and other beneficial insects, making it an excellent choice for pollinator-friendly gardens
  • Low maintenance: Once established, it requires minimal care and is naturally drought-tolerant
  • Self-seeding: As an annual, it will often reseed itself, creating natural drifts of color year after year
  • Native authenticity: Supporting local ecosystems by choosing plants that naturally belong in your region

Perfect Garden Settings

Congdon’s phacelia shines in several garden styles:

  • Native plant gardens and naturalized meadows
  • Xerophytic (drought-tolerant) landscapes
  • Pollinator gardens and wildlife habitats
  • Seasonal color displays in informal garden areas

Growing Conditions and Care

This adaptable native thrives in USDA hardiness zones 8-10, making it well-suited to most of California’s diverse climate zones. Here’s what Congdon’s phacelia prefers:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soils; adaptable to various soil types
  • Water: Moderate water during establishment, then drought-tolerant
  • Space: Allow room for natural spreading and self-seeding

Planting and Care Tips

Growing Congdon’s phacelia is refreshingly straightforward:

  • When to plant: Direct seed in fall for best results, allowing natural winter stratification
  • Soil prep: Ensure good drainage; this plant doesn’t like soggy conditions
  • Watering: Provide regular water during germination and early growth, then reduce as plants establish
  • Maintenance: Minimal care needed; allow plants to complete their cycle and drop seeds naturally

A Note About Responsible Sourcing

Congdon’s phacelia has an uncertain conservation status, which means we should be mindful about how we source our plants or seeds. When adding this species to your garden, look for reputable native plant nurseries or seed suppliers who ethically collect and propagate their stock. This ensures we’re supporting conservation efforts rather than potentially impacting wild populations.

The Bottom Line

Congdon’s phacelia offers California gardeners a wonderful opportunity to create beautiful, ecologically valuable landscapes that celebrate the state’s natural heritage. While it may be a lesser-known native compared to some showier wildflowers, its delicate charm and important role in supporting pollinators make it a worthwhile addition to any native plant enthusiast’s garden. With minimal care requirements and the ability to self-seed, it’s a gift that keeps giving, creating natural beauty while supporting the local ecosystem year after year.

Congdon’s 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 congdonii Greene - Congdon's phacelia

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