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Sawtooth Goldenbush Back to Plant Page
Hazardia squarrosa

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About Sawtooth Goldenbush (Hazardia squarrosa) Hazardia squarrosa is a species of shrub in the Asteraceae (Sunflower) family known by the common name Sawtooth Goldenbush. It is native to California and Baja California, where it grows in coastal and inland scrub and chaparral habitats from Monterey County southward. This is a shrub of variable size, from low and clumpy to sprawling over two meters tall. It is covered in thick, sharply toothed leaves a few centimeters long and is generally not very hairy or woolly. It bears discoid flower heads covered in greenish, pointed phyllaries and opening into an array of long yellow to slightly reddish disc florets and no ray florets. There are three recognized varieties with largely overlapping ranges. In the garden it provides long lasting summer color and is popular with many insects including butterflies. Also valuable in restoration projects.
Plant Description
Plant Type
Perennial herb

Max. Height
4 - 8 ft (1.2 - 2.4 m)

Max. Width
8 ft (2.4 m)

Summer Semi-Deciduous

Flower Color
Yellow, Green

Flowering Season
Summer, Fall

Native Status

Natural Setting
Site Type
Flats and canyon bottoms

Sun, Part Shade

Elevation ?
-30' - 7419'

Annual Precip. ?
4.0" - 74.1"

Summer Precip. ?
0.14" - 2.82"

Coldest Month ?
33.5° F - 56.8° F

Hottest Month ?
57.7° F - 87.2° F

Humidity ?
0.77 vpd - 38.18 vpd

Soil Description
Tolerates clay soil but is more commonly found on sandy soils

Soil PH
6.0 - 8.0

Fast, Medium, Slow

Cold Tolerance(° F)
Tolerates cold to 5° F

Companion Plants
Use with Sagebrush (Artemisia californica or palmeri), Viguiera (Bahiopsis laciniata), Dudleya sp., Brittlebush (Encelia californica), Buckwheat (Eriogonum sp.), Yucca (HerperoYucca whipplei or Yucca shidigera), Lupine (Lupinus sp.), Sticky Monkeyflower (Mimulus aurantiacus), Bladderpod (Peritoma arborea), Scrub Oak (Quercus dumosa or berberidifolia), Sage (Salvia sp.), and various cactus species.

Wildlife Attracted
Insects, including butterflies

Landscaping Information
Ease of Care
Very Easy

Water Requirement ?
Very Low, Low
Extremely Low
Very Low
Moderate - High

Moderately Popular

Max. Summer Water ?
No Summer Water
Keep moist

Inorganic, Organic with Rocks

Common uses
Bird Gardens

Nursery Availability
Commonly Available

Other Names
Common Names
Sawtooth Bristleweed

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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