Tropical Hibiscus, Cajun Hibiscus 'Cajun Blue'

Hibiscus rosa-sinensis

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscus (hi-BIS-kus) (Info)
Species: rosa-sinensis (RO-sa-sy-NEN-sis) (Info)
Cultivar: Cajun Blue
Additional cultivar information:(Cajun Series)
Hybridized by Dupont
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36-48 in. (90-120 cm)

4-6 ft. (1.2-1.8 m)


4-6 ft. (1.2-1.8 m)


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)

Sun Exposure:

Full Sun

Bloom Color:

Medium Blue

Bloom Time:

Blooms repeatedly



Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:


Propagation Methods:

From herbaceous stem cuttings

From woody stem cuttings

From softwood cuttings

From semi-hardwood cuttings

Seed Collecting:

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

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


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

San Bernardino, California

Kenner, Louisiana

Gardeners' Notes:


On Dec 18, 2011, RobertWM from Clawson, MI wrote:

The 'blueness' of blue flowers is often exaggerated and so it is with "Cajun Blue". It's really lavender, sometimes with blue highlights, sometimes with pink. But it's a beautiful lavender, with a lit-from-behind quality that gives some lavender flowers an apparent inner glow. The plant is described a upright which is putting it mildly. Leggy and spindly would be more accurate. (I have two planted together in one pot for a fuller look.) The foliage is also rather coarse and weedy compared to some other Hibiscus. So why a positive rating. Simple. The plant blooms and blooms a lot. Sometimes in the dead of winter, on plants maybe 8" tall, it will open two or three blossoms at once. A very welcome display. The blossoms also last two and sometimes three days.Finally it seems less prone to whit... read more