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Woolly Yerba Santa Back to Plant Page
Eriodictyon tomentosum

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About Woolly Yerba Santa (Eriodictyon tomentosum) Eriodictyon tomentosum is a species of flowering plant in the waterleaf family known by the common name woolly yerba santa. This shrub is endemic to California, where it grows on the chaparral slopes of the central coast ranges. It reaches maximum heights anywhere from one to three meters. Its twigs and foliage are covered in a dense coat of white woolly hairs, giving the bush a silvery look. The leaves are oval and up to ten centimeters long and five wide, and they may have small teeth along the edges. The bush flowers in dense fuzzy bunches of very light lavender hairy blossoms, each a few millimeters long. The fruit is a tiny capsule less than three millimeters wide, containing about 10 minute seeds.
Plant Description
Plant Type

Max. Height
3.3 - 10 ft (1 - 3 m)

Flower Color

Native Status

Natural Setting
Site Type
Slopes, ridges, ravines, disturbed places,

Sun, Part Shade

Elevation ?
193' - 5742'

Annual Precip. ?
5.7" - 45.5"

Summer Precip. ?
0.17" - 0.85"

Coldest Month ?
40.0° F - 56.8° F

Hottest Month ?
62.6° F - 85.4° F

Humidity ?
0.63 vpd - 36.26 vpd

Sunset Zones ?
7*, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

Landscaping Information
Ease of Care
Moderately Easy

Common uses
Hedges, Deer Resistant, Butterfly Gardens, Bee Gardens

Nursery Availability
Rarely Available

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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