Great Blue Lobelia 'Lilac Candles'

Lobelia siphilitica

Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Lobelia (low-BEE-lee-a) (Info)
Species: siphilitica (sigh-fy-LY-tih-kuh) (Info)
Cultivar: Lilac Candles



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


12-18 in. (30-45 cm)

18-24 in. (45-60 cm)


12-15 in. (30-38 cm)


USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

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)

Sun Exposure:

Light Shade


All parts of plant are poisonous if ingested

Bloom Color:


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; stratify if sowing indoors

From seed; sow indoors before last frost

From seed; direct sow after last frost

Seed Collecting:

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

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:

Solsberry, Indiana

Averill Park, New York

Lake Toxaway, North Carolina

Norristown, Pennsylvania

Gardeners' Notes:

No details have been posted.