North America Native Plant

Owyhee Phacelia

Botanical name: Phacelia lutea var. calva

USDA symbol: PHLUC

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Owyhee Phacelia: A Hidden Gem for Western Native Gardens If you’re looking to add a splash of sunshine to your native garden while supporting local pollinators, meet the Owyhee phacelia (Phacelia lutea var. calva). This charming annual wildflower might not be the showiest plant in the garden center, but it’s ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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. ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Owyhee Phacelia: A Hidden Gem for Western Native Gardens

If you’re looking to add a splash of sunshine to your native garden while supporting local pollinators, meet the Owyhee phacelia (Phacelia lutea var. calva). This charming annual wildflower might not be the showiest plant in the garden center, but it’s got character and ecological value that make it worth considering for the right gardener.

What Makes Owyhee Phacelia Special?

The Owyhee phacelia is a true native of the American West, calling Idaho, Nevada, and Oregon home. This herbaceous annual forb produces clusters of small, bright yellow flowers arranged in the distinctive coiled formation that makes Phacelia species so recognizable. While it may be modest in stature, what it lacks in size it makes up for in charm and ecological benefits.

Where Does It Grow Naturally?

This plant is native to a specific region spanning parts of Idaho, Nevada, and Oregon, particularly the Owyhee region that gives it its common name. It has adapted to the unique conditions of this high desert landscape, making it perfectly suited for gardens in similar climates.

A Note About Conservation

Here’s something important to know: Owyhee phacelia has a conservation status that suggests it’s not as common as some other wildflowers. If you decide to grow this plant, make sure you source seeds or plants from reputable native plant nurseries that collect responsibly and don’t impact wild populations. Think of it as being a good steward of our native plant heritage.

Why Grow Owyhee Phacelia?

There are several compelling reasons to consider this native annual for your garden:

  • Pollinator magnet: The nectar-rich yellow flowers attract bees and other native pollinators
  • Drought tolerance: Once established, it thrives with minimal water
  • Native plant gardens: Perfect for authentic regional wildflower displays
  • Low maintenance: As an annual adapted to harsh conditions, it doesn’t need pampering
  • Unique appearance: The coiled flower clusters add interesting texture to plantings

Growing Conditions and Care

Owyhee phacelia is refreshingly undemanding, which makes sense given its origins in the challenging high desert environment. Here’s what it needs to thrive:

  • Sunlight: Full sun is essential
  • Soil: Well-draining soils; it actually prefers lean, rocky, or sandy conditions
  • Water: Drought tolerant once established; avoid overwatering
  • Climate: Hardy in USDA zones 4-8, matching its native range

Planting and Care Tips

Growing Owyhee phacelia successfully is all about mimicking its natural habitat:

  • Direct seed in fall or early spring for best results
  • Scatter seeds on prepared soil surface and lightly rake in
  • Water gently until germination, then reduce watering significantly
  • Avoid fertilizing – this plant prefers lean soils
  • Allow plants to self-seed for natural-looking drifts

Best Garden Settings

Owyhee phacelia shines in specific garden styles:

  • Native wildflower meadows
  • Rock gardens and xeriscapes
  • Desert-themed landscapes
  • Pollinator gardens with other native plants
  • Naturalistic plantings that mimic local ecosystems

Is This Plant Right for You?

Owyhee phacelia is perfect if you’re gardening in its native region and want to create authentic, low-water landscapes that support local wildlife. It’s not the right choice if you prefer high-impact ornamentals or garden in areas with heavy, clay soils and high rainfall.

Remember, this is a plant with conservation considerations, so approach it with respect and source it responsibly. When grown thoughtfully, Owyhee phacelia can be a wonderful addition to native plant gardens, offering both beauty and ecological benefits while connecting your landscape to the natural heritage of the American West.

Owyhee 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 lutea (Hook. & Arn.) J.T. Howell - yellow phacelia

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