North America Native Plant

Glandular Yellow Phacelia

Botanical name: Phacelia adenophora

USDA symbol: PHAD

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Miltitzia glandulifera (Torr. ex S. Watson) A. Heller (MIGL9)  âš˜  Phacelia lutea (Hook. & Arn.) J.T. Howell var. glandulifera (Torr. ex S. Watson) Cronquist (PHLUG)   

Glandular Yellow Phacelia: A Hidden Gem for Western Native Gardens If you’re looking to add some sunny charm to your native plant collection, the glandular yellow phacelia might just be the delightful annual you’ve been searching for. This charming wildflower brings a splash of golden color to gardens while supporting ...

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 ⚘

Glandular Yellow Phacelia: A Hidden Gem for Western Native Gardens

If you’re looking to add some sunny charm to your native plant collection, the glandular yellow phacelia might just be the delightful annual you’ve been searching for. This charming wildflower brings a splash of golden color to gardens while supporting local pollinators and staying true to its western roots.

What Is Glandular Yellow Phacelia?

Glandular yellow phacelia (Phacelia adenophora) is a native annual forb that calls the American West home. As an herbaceous plant without woody stems, it completes its entire life cycle in a single growing season, making it perfect for gardeners who love the excitement of replanting and redesigning their spaces each year.

This lovely native can be found naturally growing across California, Nevada, Oregon, and Utah, where it has adapted to the region’s unique climate and soil conditions.

Why Consider Growing Glandular Yellow Phacelia?

There are several compelling reasons to welcome this native beauty into your garden:

  • Native plant benefits: As a true native, it supports local ecosystems and requires less water and maintenance than non-native alternatives
  • Pollinator magnet: Like its Phacelia cousins, this plant attracts bees and other beneficial pollinators with its nectar-rich blooms
  • Low maintenance: Once established, it typically thrives with minimal intervention
  • Unique beauty: The cheerful yellow flowers add a distinctive pop of color to wildflower gardens

Important Considerations

Before you rush to plant glandular yellow phacelia, there’s one important thing to keep in mind: this plant has a conservation status that suggests it may be somewhat uncommon in the wild. If you decide to grow it, make sure you source seeds or plants from reputable native plant nurseries that practice responsible collection methods. Never collect seeds from wild populations.

Perfect Garden Settings

Glandular yellow phacelia shines brightest in:

  • Native wildflower gardens
  • Xeriscape and drought-tolerant landscapes
  • Natural or informal garden designs
  • Pollinator gardens
  • Desert-themed gardens

Growing Conditions and Care

This western native appreciates conditions similar to its natural habitat:

  • Sunlight: Full sun exposure for best flowering
  • Soil: Well-draining soils; avoid heavy clay or constantly moist conditions
  • Water: Low to moderate water needs once established
  • Climate: Best suited for USDA hardiness zones 7-10

Planting and Care Tips

Growing glandular yellow phacelia is refreshingly straightforward:

  • Timing: Direct seed in fall for spring germination, or early spring after the last frost
  • Seeding: Scatter seeds on prepared soil and lightly rake in
  • Spacing: Allow adequate space for air circulation
  • Watering: Provide regular water during germination and establishment, then reduce frequency
  • Maintenance: Minimal care needed; allow plants to self-seed for next year’s display

The Bottom Line

Glandular yellow phacelia offers native plant enthusiasts a wonderful opportunity to grow something truly special. While its somewhat uncommon status means you’ll need to source it responsibly, the reward is a beautiful, pollinator-friendly annual that connects your garden to the natural heritage of the American West. Just remember to let some plants go to seed – you’ll likely be rewarded with an even better show next year!

Glandular Yellow 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 adenophora J.T. Howell - glandular 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