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Arabian Gentian

Exacum affine (EKS-uh-kum uh-FEE-nee)

Family: Gentianaceae Unknown Herbaceous (1-3 ft)

Persian Violet is a short-lived perennial, more commonly grown outside as an annual in tropical climates, that is native to Yemen. It can be grown as a permanent outdoor plant only in humid tropical or subtropical environments.This foot high plant displays shiny green foliage and very attractive blue to deep purple flowers for an extended bloom season. The genus name is a variant of the Gallic name exacon for centaurium transferred to this genus.The species name means related to or similar. Persian Violet does well in well-drained, but moist, soil in partial shade. It does not tolerate direct sun. When grown outdoors, it also requires warm nighttime temperatures of 60° to 70°F. In its native zones, Persian Violet is often grown outdoors as a bedding plant or ground cover. Otherwise, it is more commonly grown as a potted plant. It is more often grown as a potted plant in well-drained, moist potting soil. The plant will flower for an extended period, but is very difficult to keep growing after flowering; however cuttings can be taken and successfully replanted. The fragrant flowers will densely clothe this plant if it is grown under the proper cultural conditions. Diseases, Insect Pests, and Other Plant Problems: As an outdoor plant, there are no serious diseases or insect pests. It is susceptible to most of the problems common to indoor plants.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 34 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (1-3 ft)
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.

Fills a similar niche Oncidium sphacelatum Strobilanthes alternata 'Exotica' Thymus vulgaris

Full plant profile

Growing Conditions
Plant type
Annual; Perennial
Life cycle
Annual; Perennial
USDA zones
10a, 10b, 11a, 11b, 12a, 12b
Light
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
High Organic Matter; Loam (Silt)
Soil drainage
Good Drainage | Moist
Mature size
Height: 0 ft. 6 in. - 1 ft. 6 in. | Width: 0 ft. 6 in. - 1 ft. 0 in.
Maintenance
Low
Canopy layer
4 - Herbaceous (1-3 ft)
Form & Appearance
Habit / form
Rounded
Leaf color
Green
Leaf shape
Ovate
Leaf feel
Glossy
Leaf value
Showy
Leaf size
< 1 inch long, < 1 inch wide
Hairs present
No
Leaf detail
The tiny ovate leaves densely cover the stems.
Flower color
Blue; Purple/Lavender
Flower value
Fragrant; Long Bloom Season; Showy
Flower detail
Blossom color ranges from blue to deep purple with bright yellow pollen masses in their centers.
Bloom time
Spring; Summer
Wildlife & Ecology
Native status
Unknown
Origin
Yemen, Oman
Landscape Use
Landscape location
Container; Hanging Baskets
Design feature
Accent; Specimen
Garden tags
#tropical herbaceous perennial #tender perennial #showy flowers #purple flowers #non-toxic for cats #non-toxic for horses #non-toxic for dogs #container plant #annual #warm climates #potted #fragrant flowers
Problems & Resistance
Propagation
Root Cutting; Stem Cutting

Planted at Hunnicutt

Nobody’s planted this one yet.