Cape Leadwort 'Imperial Blue'

Plumbago auriculata

Family: Plumbaginaceae (plum-baj-i-NAY-see-ee) (Info)
Genus: Plumbago (plum-BAY-go) (Info)
Species: auriculata (aw-rik-yoo-LAY-tuh) (Info)
Cultivar: Imperial Blue



Foliage Color:


Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


36-48 in. (90-120 cm)


8-10 ft. (2.4-3 m)


Unknown - Tell us

Sun Exposure:

Full Sun


All parts of plant are poisonous if ingested

Bloom Color:

Light Blue

Medium Blue

Bloom Time:

Late Spring/Early Summer

Blooms all year


This plant is resistant to deer

Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

From semi-hardwood cuttings

Seed Collecting:

Unknown - Tell us


This plant has been said to grow in the following regions:


Jones, Alabama

Phoenix, Arizona

Tucson, Arizona

Little Rock, Arkansas

Clayton, California

Los Angeles, California

San Leandro, California

Temecula, California

Fort Lauderdale, Florida

Fort Myers, Florida

Gainesville, Florida (2 reports)

Palm Coast, Florida

Saint Petersburg, Florida

Tallahassee, Florida

Tampa, Florida

Umatilla, Florida

West Palm Beach, Florida

Savannah, Georgia

Bogalusa, Louisiana

Saint Francisville, Louisiana

Zachary, Louisiana

Florence, Mississippi

Concord, North Carolina

Leland, North Carolina

Cincinnati, Ohio

Broken Arrow, Oklahoma

Bryan, Texas

Bulverde, Texas

Georgetown, Texas

Manvel, Texas

Powderly, Texas

San Antonio, Texas

show all

Gardeners' Notes:


On Jul 18, 2010, themikeman from Concord, NC (Zone 7a) wrote:

I always thought this was a sky blue variety of phlox paniculata but its not. i just bought 2 this year and they are extremely healthy, infact since their isn't an actual true sky blue variety of phlox i planted these imperial blue tall plumbago in with them and it did the trick;.. now i have every color of the rainbow in my phlox garden thanks to these plumbago, and the only way to distinguish the difference, is that the plumbago has olivey or limey color looking leaves. mike.


On Aug 20, 2004, Toplady6 from Saratoga Springs, NY wrote:

I have my Blue Plumbago in a large pot. In zone 4 we treat it as a Tropical. I bring it into the basement which stay between 45 an 50 degrees all winter. I cut it back to about 12 inches and water once a month. In the spring after frost I bring it out , fertilize and it grows to about 3 feet around and gives me a profusion of gorgeous blooms. I could not have this otherwise. So anyone who lives in a non hardy zone can enjoy this beautiful blue flower.


On Sep 11, 2003, Happenstance from Northern California, CA wrote:

Better suited to an open space or wild land setting, grows very large with normal water and fertilizer. Hummers love it.