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Imbricate Phacelia
Phacelia imbricata

About Imbricate Phacelia (Phacelia imbricata) Phacelia imbricata is a species in the Boraginaceae (Fort-me-not) family known by the common name Imbricate Phacelia. It is native to much of California and Baja California, where it can be found in varied habitat in mountains, valleys, and coastline. It is a perennial herb growing decumbent or erect to a maximum height exceeding one meter. It is hairy and coated in stiff hairs. The leaves may be up to 15 centimeters long and are divided into several leaflets. The flower cluster is a one-sided curving or coiling cyme of many bell-shaped flowers. The flower is roughly half a centimeter long and white to pale purple in color. It is almost always grown from seed. There are four recognized varieties with differing geographic ranges.

It should be noted that there are a very large number of species in the genus Phacelia. Most are annuals. Gardeners should look for species appropriate to their area and garden conditions.
Plant Description
Plant Type
Annual herb, Perennial herb

Max. Height
1.6 - 3.3 ft (0.49 - 1 m)

Max. Width
2 ft (0.6 m)

Growth Rate

Summer Semi-Deciduous

Grey-green, hairy

Flower Color

Flowering Season
Spring, Winter

Native Status

Natural Setting
Site Type
Slopes, flats, canyons, coastal mountains and Sierra foothills

Sun, Part Shade

Elevation ?
30' - 9154'

Annual Precip. ?
7.6" - 75.2"

Summer Precip. ?
0.15" - 3.08"

Coldest Month ?
26.5° F - 54.3° F

Hottest Month ?
55.2° F - 79.7° F

Humidity ?
0.12 vpd - 28.31 vpd

Soil Description
Tolerates clay or sandy soil

Soil PH
5.0 - 7.0

Fast, Medium, Slow

Cold Tolerance(° F)
Tolerates cold to 0° F

Companion Plants
Use in part shade under various trees, and with other perennials and shrubs such as Manzanita (Arctostaphylos sp.), Barberry (Berberis sp.), Ceanothus sp., Buckwheat (Eriogonum sp.), Silktassel Bush (Garrya sp.), Sticky Monkeyflower (Mimulus aurantiacus), Holly Leaf Cherry (Prunus ilicifolia), Oak (Quercus sp.), and Currant/Gooseberry (Ribes sp.)

Wildlife Attracted
Very attractive to insects, especially bees

Landscaping Information
Water Requirement ?
Very Low
Extremely Low
Very Low
Moderate - High

Rarely Used

Max. Summer Water ?
No Summer Water
Keep moist

Propagation ?
For propagating by seed: No treatment.

Common uses
Butterfly Gardens, Bee Gardens

Nursery Availability
Sometimes Available

Other Names
Common Names
Imbricate Scorpionweed

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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