North America Native Plant

Hairy Yerba Santa

Botanical name: Eriodictyon trichocalyx

USDA symbol: ERTR7

Life cycle: perennial

Habit: shrub

Native status: Native to the lower 48 states  

Hairy Yerba Santa: A Fragrant California Native Worth Growing If you’re looking to add some authentic California character to your garden while supporting local wildlife, hairy yerba santa (Eriodictyon trichocalyx) might just be your new best friend. This charming native shrub brings both beauty and ecological benefits to the right ...

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 ⚘

Hairy Yerba Santa: A Fragrant California Native Worth Growing

If you’re looking to add some authentic California character to your garden while supporting local wildlife, hairy yerba santa (Eriodictyon trichocalyx) might just be your new best friend. This charming native shrub brings both beauty and ecological benefits to the right garden setting, though it’s not without its quirks.

What Makes Hairy Yerba Santa Special?

Hairy yerba santa is a perennial shrub that’s as California as it gets – it’s found nowhere else in the world except the Golden State. This multi-stemmed woody plant typically stays manageable at under 13-16 feet tall, making it perfect for residential landscapes. What really sets it apart are its distinctive narrow leaves covered in woolly hairs and sticky resin, which give off a pleasant, medicinal fragrance when brushed against.

The plant produces clusters of small, tubular flowers that range from white to pale purple, creating a delicate display that pollinators absolutely love. It’s this combination of unique texture, fragrance, and ecological value that makes hairy yerba santa a standout choice for native plant enthusiasts.

Where Does It Come From?

This California endemic calls the state’s chaparral and woodland regions home, thriving in the Mediterranean climate that defines much of the region. You’ll find it naturally occurring throughout various parts of California, where it has adapted perfectly to the dry summers and mild, wet winters.

Why Plant Hairy Yerba Santa?

There are several compelling reasons to consider adding this native shrub to your garden:

  • Drought tolerance: Once established, it requires minimal supplemental watering
  • Pollinator magnet: Native bees, butterflies, and other beneficial insects flock to its flowers
  • Low maintenance: Requires little care once settled in
  • Authentic habitat: Supports local ecosystems and wildlife
  • Erosion control: Great for slopes and areas prone to erosion

Perfect Garden Settings

Hairy yerba santa shines in specific garden styles:

  • Native California gardens
  • Xeriscape and drought-tolerant landscapes
  • Wildlife and pollinator gardens
  • Chaparral restoration projects
  • Naturalistic plantings on slopes or hillsides

Growing Conditions and Care

Success with hairy yerba santa comes down to mimicking its natural habitat:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soil is essential – avoid heavy clay or areas that stay wet
  • Water: Drought tolerant once established, but benefits from occasional deep watering in extreme heat
  • Climate: Hardy in USDA zones 8-10, perfect for Mediterranean climates

Planting and Care Tips

Getting your hairy yerba santa off to a good start is straightforward:

  • Plant in fall when temperatures cool and rains begin
  • Dig a hole twice as wide as the root ball but no deeper
  • Water regularly the first year to establish roots
  • After establishment, water deeply but infrequently
  • Prune lightly after flowering to maintain shape
  • Avoid fertilizers – these plants prefer lean soil

A Word About Rarity

It’s worth noting that hairy yerba santa has a conservation status that suggests it may be somewhat uncommon in the wild. If you decide to add this plant to your garden, make sure to source it from reputable native plant nurseries that propagate their own stock rather than collecting from wild populations. This ensures you’re supporting conservation rather than potentially harming wild communities.

Is Hairy Yerba Santa Right for Your Garden?

This native shrub is ideal if you’re gardening in California and want to create habitat for local wildlife while enjoying a low-maintenance, drought-tolerant landscape. It’s perfect for gardeners who appreciate subtle beauty and the satisfaction of growing plants that truly belong in their region.

However, it might not be the best choice if you prefer formal gardens, need plants that thrive with regular watering, or live outside its natural climate range. Like many California natives, it can look a bit sparse or informal compared to non-native alternatives.

If you’re ready to embrace the unique character of California’s native flora while supporting local pollinators and wildlife, hairy yerba santa could be an excellent addition to your garden palette.

Hairy Yerba Santa

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

Eriodictyon Benth. - yerba santa

Species

Eriodictyon trichocalyx A. Heller - hairy yerba santa

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