North America Native Plant

Wavyleaf Buckbrush

Botanical name: Ceanothus foliosus var. medius

USDA symbol: CEFOM

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Wavyleaf Buckbrush: A Rare California Native Worth Growing Responsibly If you’re passionate about California native plants and supporting local ecosystems, wavyleaf buckbrush (Ceanothus foliosus var. medius) might just capture your heart. This charming perennial shrub brings delicate beauty to the garden while playing an important role in supporting native wildlife. ...

Rare plant alert!

Region: Conservation status by state

Status: S3T1T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ 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 ⚘ 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. ⚘

Wavyleaf Buckbrush: A Rare California Native Worth Growing Responsibly

If you’re passionate about California native plants and supporting local ecosystems, wavyleaf buckbrush (Ceanothus foliosus var. medius) might just capture your heart. This charming perennial shrub brings delicate beauty to the garden while playing an important role in supporting native wildlife. However, there’s something crucial every gardener should know before adding this plant to their landscape.

A Special Plant with Conservation Concerns

Wavyleaf buckbrush holds a Global Conservation Status of S3T1T3, which indicates this variety has limited distribution and may be vulnerable. This rarity status means that if you choose to grow this beautiful native, it’s essential to source your plants responsibly from reputable native plant nurseries that propagate rather than wild-collect their stock. Never harvest from wild populations.

Where You’ll Find This California Treasure

This lovely shrub is native to California and naturally occurs in the Sierra Nevada foothills and adjacent regions. As a true California endemic, it’s perfectly adapted to the state’s Mediterranean climate and represents an authentic piece of the Golden State’s natural heritage.

Why Gardeners Fall for Wavyleaf Buckbrush

Don’t let its rarity fool you into thinking this plant is finicky – wavyleaf buckbrush is actually quite garden-friendly once you understand its needs. Here’s what makes it special:

  • Delicate clusters of white to pale blue flowers that bloom in spring
  • Distinctive wavy-edged leaves that give the plant its common name
  • Compact shrub form, typically staying under 13-16 feet (though often much smaller)
  • Excellent drought tolerance once established
  • Multi-stemmed woody structure that provides year-round interest

A Pollinator’s Best Friend

Like other members of the Ceanothus family, wavyleaf buckbrush is a pollinator magnet. Its nectar-rich flowers attract native bees, butterflies, and other beneficial insects, making it an excellent choice for gardeners who want to support local wildlife. The shrub also provides shelter and nesting sites for small birds and beneficial insects.

Perfect Garden Scenarios

Wavyleaf buckbrush shines in several landscape settings:

  • Native plant and wildlife gardens
  • Water-wise and drought-tolerant landscapes
  • Mediterranean-style gardens
  • Naturalistic plantings and restoration projects
  • Erosion control on slopes
  • Ground cover applications

Growing Conditions That Make It Happy

Success with wavyleaf buckbrush comes down to mimicking its natural habitat:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soil is absolutely essential – this plant hates wet feet
  • Water: Drought tolerant once established, but appreciates occasional deep watering during extremely dry periods
  • Climate: Thrives in USDA hardiness zones 8-10

Planting and Care Tips for Success

Getting your wavyleaf buckbrush off to a good start is straightforward:

  • Timing: Plant in fall for best establishment
  • Spacing: Allow room for the mature size and good air circulation
  • Watering: Water regularly the first year, then reduce to minimal supplemental irrigation
  • Pruning: Light pruning after flowering helps maintain shape
  • Fertilizing: Generally unnecessary – these plants prefer lean soils

The Bottom Line

Wavyleaf buckbrush offers California gardeners a chance to grow a truly special native plant that supports local ecosystems while adding unique beauty to the landscape. Its rarity makes it even more precious, but also means we must be thoughtful stewards. If you decide to grow this remarkable shrub, source it responsibly and consider yourself a conservation gardener helping preserve California’s botanical heritage.

Remember, every native plant in our gardens is a small act of habitat restoration. With proper care and responsible sourcing, wavyleaf buckbrush can be both a garden treasure and a conservation success story.

Wavyleaf Buckbrush

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Rhamnales

Family

Rhamnaceae Juss. - Buckthorn family

Genus

Ceanothus L. - ceanothus

Species

Ceanothus foliosus Parry - wavyleaf ceanothus

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