Mexican orange blossom
Also known as
Mexican orange, Mexican mock orange, Choisya, Trifoliate choisya
Keep this plant’s care guide close at hand.
Get the appAbout Mexican orange blossom
Choisya ternata, commonly called Mexican orange blossom, is an evergreen shrub in the citrus family (Rutaceae) valued for its glossy, trifoliate leaves and intensely fragrant, starry white flowers. Native to upland regions of Mexico, it forms a dense, rounded mound 1.5–2.5 m tall and wide, making an excellent screen, hedge, or specimen in mild climates. Foliage releases a sweet, citrusy scent when brushed or crushed, and the main bloom in spring is often followed by a lighter repeat in late summer or autumn. Plants prefer freely draining soil and shelter from the coldest winds, yet they cope well with urban conditions and short dry spells once established. The shrub is relatively pest-free, deer-resistant, and attractive to pollinators. Numerous cultivars exist for different leaf colors and sizes, but the species remains prized for reliability and ease of care in USDA Zones 7–10 (with winter protection at the colder end).
Taxonomy
Properties & Requirements
How to care for Mexican orange blossom
Water
Water regularly during the first growing season to establish a deep, extensive root system. Thereafter, water when the top 3–5 cm of soil dries; Choisya is moderately drought tolerant but dislikes waterlogging. In hot, dry spells, give a thorough soak rather than frequent light sprinklings. Container-grown plants dry faster—check more often and ensure free drainage. Mulch 5–7 cm deep to reduce evaporation and moderate soil temperature, keeping mulch a few centimeters away from the stems.
Light
Thrives in full sun to partial shade. In cool-summer regions, more sun promotes compact growth and abundant bloom. In hot-summer climates, provide afternoon shade or dappled light to prevent leaf scorch and moisture stress. Deep shade leads to sparse flowering and legginess. Aim for at least 4–6 hours of direct sun in temperate zones, or bright, filtered light where summers are intense. Maintain open exposure with protection from harsh, drying winds.
Nutrients
Feed sparingly. In early spring, apply a balanced, slow‑release fertilizer (around 8‑8‑8 to 10‑10‑10) or a 2–5 cm layer of compost to support flowering and new growth. In poor soils, a light top‑up after the first bloom can encourage a modest rebloom. Avoid high‑nitrogen formulas that promote overly soft growth. Do not fertilize late in the season in cold climates, as tender growth may be damaged by frost. Always water in well and mulch to stabilize soil nutrients.
Temperature
Hardy in USDA Zones 7–10; established plants tolerate brief dips to about −9 °C (15 °F) in sheltered spots. Ideal growth occurs between 10–27 °C (50–80 °F). Protect young shoots from late spring frosts and cold, desiccating winds. In very hot climates, provide mulch and occasional deep watering during heatwaves; foliage may scorch above 35 °C (95 °F) if soil is dry or exposure is extreme. Container plants can be moved to a frost-free, bright location for winter.
