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Lobelia 'Ruby Slippers'


Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Lobelia (low-BEE-lee-a) (Info)
Cultivar: Ruby Slippers



Water Requirements:

Requires consistently moist soil; do not let dry out between waterings

Sun Exposure:

Sun to Partial Shade

Light Shade





Foliage Color:



24-36 in. (60-90 cm)


12-15 in. (30-38 cm)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

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)

Where to Grow:

Unknown - Tell us


All parts of plant are poisonous if ingested

Bloom Color:

Scarlet (dark red)

Bloom Characteristics:

Unknown - Tell us

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Summer/Early Fall

Other details:

Unknown - Tell us

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:

By dividing the rootball

From herbaceous stem cuttings

From seed; direct sow outdoors in fall

Direct sow as soon as the ground can be worked

From seed; sow indoors before last frost

Seed Collecting:

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

Properly cleaned, seed can be successfully stored

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed


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

Cordele, Georgia

Ewing, Kentucky

Annapolis, Maryland

Cambridge, Massachusetts

Saint Paul, Minnesota

West Plains, Missouri

Northport, New York

Oxford, New York

Murrysville, Pennsylvania

Wilkes Barre, Pennsylvania

Summerville, South Carolina

Lexington, Virginia

Mc Lean, Virginia

Winchester, Virginia

Pullman, Washington

show all

Gardeners' Notes:


On Jun 11, 2014, Jay11 from Cambridge, MA wrote:

I have grown this plant for several years. I love the color and find it worth the trouble keep it going. Individual plants live only a few years so replacement or propagation is necessary. The plants do really need a lot of moisture so I now have them on the north east side of my house where it is fairly damp. Moisture is more important than sun in my experience. I suggest Conoclinium coelestinum Cori (blue mist plant) as a companion plant, beautiful.


On Aug 11, 2011, bottlegreen from Saint Paul, MN wrote:

Only 6 of the 15 I ordered from Bluestone survived, but these 6 are sensational. A glorious color; I agree that it's hard to describe! The plants are fresh-looking when the rest of the garden is getting tired, but they begin to flower before the really late perennials ('Autumn Joy,' obedient plant, L. speciosum, etc.). A lot of sun is fine--even better--as long as the soil isn't too dry.


On Aug 14, 2009, ericabelle from West Plains, MO (Zone 6b) wrote:

This is my first year with this lobelia, and it is one of my new favorites! I wish I could describe the color - photos don't quite do it justice. It is a very dark fuschia-maroon color - very unusual! It is not, however, so "red" that it detracts from the other flowers in the bed - it compliments the other colors. AND the hummingbirds love it!