Phacelia Species, California Bluebells, Desert Bluebells

Phacelia campanularia

Family: Hydrophyllaceae
Genus: Phacelia (fa-SEE-lee-uh) (Info)
Species: campanularia (kam-pan-yoo-LAR-ee-uh) (Info)



Water Requirements:

Drought-tolerant; suitable for xeriscaping

Sun Exposure:

Full Sun



Foliage Color:

Unknown - Tell us


6-12 in. (15-30 cm)

12-18 in. (30-45 cm)


3-6 in. (7-15 cm)


USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Where to Grow:

Grow outdoors year-round in hardiness zone



Bloom Color:

Dark Blue

Medium Blue

Bloom Characteristics:

Flowers are good for drying and preserving

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Spring/Early Summer

Mid Summer

Other details:

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

From seed; direct sow outdoors in fall

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds


This plant is said to grow outdoors in the following regions:

Gilbert, Arizona

Green Valley, Arizona

Maricopa, Arizona

Phoenix, Arizona

Tucson, Arizona

Borrego Springs, California

Citrus Heights, California

Lawndale, California

Los Angeles, California

Menifee, California

Mountain View, California

Redlands, California

Richmond, California

Santa Cruz, California

Vista, California(9 reports)

Denver, Colorado

Deland, Florida

Snellville, Georgia

Bellaire, Michigan

Henderson, Nevada

Las Vegas, Nevada(2 reports)

Panama, New York

Ronkonkoma, New York

Harrisburg, Pennsylvania

Benton City, Washington

Kalama, Washington

show all

Gardeners' Notes:


On Jun 3, 2016, LanfrancoLeo from Harrisburg, PA wrote:

I simply LOVE this plant!
It bloom profusely, develop very fast (8 weeks or less from seed to flower) and the flower are TRUE BLUE. But most importantly it attract bumblebee and butterfly!!
During the year I experimented different sow methods for this pretty annual: winter-sow, which usually perform beautifully, direct sow after last frost and indoor sowing, a couple of weeks prior tha last frost date. No matter how I sowed the plant perform beautifully!!
It is one of the few annual that I will keeping in my garden...


On Jul 9, 2013, nashiana from Austin, TX wrote:

This is plant is Phacelia campanularia, probably variety vasiformis. Phacelia minor is a different species, it is purple with a bell-shaped flower and does not have white spots. The name "Phacelia minor var. campanularia" is a synonym that should not be used. It'd be nice if the listing name could be changed as to not perpetuate confusion.

The plants themselves are fantastic and will definitely improve your garden.


On May 17, 2009, mjsponies from DeLand/Deleon Springs, FL (Zone 8b) wrote:

This plant came up from a packet of seeds I got in a seed swap that were a 'wildflower/annual' mix.
I just love it and will be looking to plant it on purpose in the future


On May 27, 2007, Anitabryk2 from Long Island, NY (Zone 6b) wrote:

This plant wintersows very well. It looks beautiful planted with Forget-me-nots. I've only had it reseed twice, otherwise, I have to replant it every year.


On Oct 3, 2003, gardenermaid from Bellaire, MI (Zone 5a) wrote:

This plant just glows in my garden. It attracted both butterflies and bees and bloomed all summer! I love this plant.