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African Blue Basil

Ocimum (OH-see-mum kill-ih-mand-SHAR-ih-kum x bah-SIL-ih-kum)

Family: Lamiaceae Unknown Herbaceous (3-15 ft)

African blue basil is a sterile, hybrid, edible herb in the Lamiaceae (mint) family. As noted in its scientific name, it is a cross between Ocimum kilimandscharicum , a camphor basil native to East Africa, and a cultivar of basilicum , 'Dark Opal', also native to Africa and to Southern Asia. The camphor parent gives this basil a taste different from most basils, and although it is fully edible, some may prefer it as a plant to attract pollinators. This plant is a perennial tropical at zone 10 and higher; however, it can be grown as an annual in colder climates with warm summers. Plant it in full sun and in moist, well-drained, humus-rich soil. Once established the plant can tolerate drier soils, but it is by no means a drought-tolerant plant. Some partial shade is tolerated in the afternoons in hot climates. This plant is more heat tolerant than other basils. It has an upright habit that over time rounds out. As the rapidly growing plant matures, its stems may become woody and heavy, sometimes flopping over. Trim unwanted branches back, and new growth will appear out of old stems. Because it does not produce seed, its flowers do not need to be pinched back to keep the plant growing like other basils. It can be propagated from cuttings or bought as a transplant. African blue basil grows well in indoor settings more than many other herbs. In the landscape, plant it in a container or a culinary herb, sensory, or pollinator garden. It is known for its showy leaves and beautiful flowers, which easily attract pollinators. Click here to see a calendar of planting schedules, time-to-harvest, and recommended spacing. Insects, Diseases, and Other Plant Problems: No significant problems.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 44 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (3-15 ft) Optimal soil pH Acid (<6.0); Neutral (6.0-8.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Full plant profile

Growing Conditions
Plant type
Annual; Edible; Herb; Perennial
Life cycle
Annual; Perennial; Woody
USDA zones
10a, 10b, 11a, 11b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
Loam (Silt)
Soil pH
Acid (<6.0); Neutral (6.0-8.0)
Soil drainage
Good Drainage | Moist | Occasionally Dry
Available space
Less than 12 inches; 12 inches-3 feet
Mature size
Height: 1 ft. 0 in. - 3 ft. 0 in. | Width: 0 ft. 10 in. - 3 ft. 0 in.
Growth rate
Rapid
Canopy layer
4 - Herbaceous (3-15 ft)
Form & Appearance
Habit / form
Erect
Leaf color
Green; Purple/Lavender
Leaf type
Simple
Leaf arrangement
Opposite
Leaf shape
Ovate
Leaf margin
Dentate
Leaf value
Fragrant
Hairs present
Yes
Leaf detail
Green and purple leaves are simple, opposite, ovate with pointed tips. They are hairy and smell of camphor.
Flower color
Pink; Purple/Lavender
Flower shape
Tubular
Flower detail
Clulusters of tubular flowers. Caylx is dark purple with pink flowers. Flowering stems are longer than other basil plants and they bloom until frost.
Bloom time
Fall; Summer
Stem color
Green; Purple/Lavender
Stem detail
Fuzzy purple green square stems
Wildlife & Ecology
Native status
Unknown
Wildlife value
Flowers are attractive to bees.
Attracts
Bees; Pollinators
Food & Medicine
Edible parts
Leaves; Flowers

Edibility

It has a stronger flavor than other basils. The leaves have a hint of camphor and a spicy basil flavor. The leaves and flowers eaten fresh or pureed with olive oil and dried in ice cube trays. Use in salads, pasta, drinks, or for garnishes. This herb does not dry well.

Landscape Use
Landscape location
Container; Houseplants
Landscape theme
Edible Garden; Garden for the Blind; Pollinator Garden; Rain Garden
Design feature
Specimen
Garden tags
#fragrant leaves #heat tolerant #nectar plant early summer #pollinator plant #vigorous #nectar plant mid-summer #interesting leaves #hairy leaves #nectar plant early fall #sensory garden #fast growing #stormwater demo garden orange co #bee friendly #container plant #wildlife friendly #herb garden #woody #herb #perennial
Problems & Resistance
Resistant to
Heat
Propagation
Stem Cutting

Planted at Hunnicutt

Nobody’s planted this one yet.