Choisya ternata was named to honor the Swiss Protestant clergyman and botanist, Jacques Denis Choisy, with ternata meaning having leaflets in threes. Mexican Orange is a shrub native to the southwest USA and Mexico that prefers mild winter locations in full to part sun and protection from the hot afternoon sun. Its common name, Mexican Orange, refers to the orange fragrance emitted from the flowers and crushed leaves. Although flowering occurs in late spring, it is possible to see additional blooms throughout the summer and into the fall. In areas north of zone 7 it can be grown in pots and brought indoors when temperatures drop below 14 degrees Fahrenheit. Temperatures below 5 degrees Fahrenheit can cause the plant to defoliate. Pruning is typically not necessary, but its tolerance for pruning allows for the removal of dead or damaged branches. Cutting to ground level is also tolerated. The shrub is known for its fragrant and lovely leaves and fragrant showy white blooms in summer. It grows in shrub form 4-8 feet tall and wide and can be used as a hedge or for privacy. Plant in humusy, moist, well-drained soils and prune after flowering for possible additional blooms. Once established it is moderately tolerant of brief droughts. In its native habitat, it can be found growing in chalky soils, often a seaside location. Cold winds can cause damage when shelter is not provided. Young plants tend to grow at a rapid pace, but as the plant ages, it will grow at a more moderate pace. Insects, Diseases, and Other Plant Problems: No serious insect or disease issues. Provide proper drainage to prevent root rot and crown rot. Limbs can die, even when there is no apparent reason.
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.
Deep shade (Less than 2 hours to no direct sunlight) | 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
Clay; Loam (Silt)
Soil pH
Acid (<6.0)
Soil drainage
Good Drainage | Moist
Available space
3 feet-6 feet; 6-feet-12 feet
NC region
Coastal; Piedmont
Mature size
Height: 4 ft. 0 in. - 8 ft. 0 in. | Width: 4 ft. 0 in. - 8 ft. 0 in.
Growth rate
Medium
Maintenance
Medium
Canopy layer
3 - Shrub (3-15 ft)
Form & Appearance
Habit / form
Dense; Mounding; Rounded
Texture
Medium
Foliage
Broadleaf Evergreen
Leaf color
Gold/Yellow; Green
Leaf type
Compound (Pinnately , Bipinnately, Palmately)
Leaf arrangement
Opposite
Leaf shape
Elliptical; Oblanceolate
Leaf margin
Entire
Leaf feel
Glossy
Leaf value
Fragrant
Leaf size
1-3 inches long, 1-3 inches wide
Hairs present
No
Leaf detail
The 3-6 inch leaves are trifoliate, glossy, aromatic and medium green in color. The new foliage is yellow-green.
Flower color
White
Flower value
Fragrant; Long Bloom Season; Showy
Flower form
Corymb; Cyme
Flower shape
Star
Flower size
1-3 inches
Flower detail
1.25-inch wide star-shaped flowers appear in corymbs in summer and are white and fragrant.