Mexican Lime (Citrus aurantiifolia) Overview The Mexican lime, also known as Key lime, is a small, aromatic citrus tree prized for its tart, flavorful fruit. This tree is often grown both for its culinary uses and as an ornamental plant, thanks to its glossy green leaves and fragrant white flowers. USDA Hardiness Zone Mexican lime trees thrive in USDA zones 9–11. They are sensitive to frost and may need protection in cooler climates or container growing that allows them to be moved indoors during winter. Sun Requirements Mexican lime trees require full sun, which means at least 6–8 hours of direct sunlight per day. Adequate sunlight is essential for healthy growth and abundant fruit production. Planting Guidance Location: Choose a site with well-draining soil. Avoid low spots where water can pool. Spacing: If planting multiple trees, space them at least 10–15 feet apart to allow for growth and air circulation. Soil: Mexican lime prefers slightly acidic, sandy-loam soil but can tolerate a range of soils as long as drainage is good. Watering: Water deeply and regularly during the first year to establish strong roots. Mature trees prefer moderate watering, allowing soil to dry slightly between watering. Container Growing: In cooler climates, Mexican lime can be grown in large pots and moved indoors during frost. Additional Tips Fertilize with a citrus-specific fertilizer 3–4 times per year for optimal growth. Prune lightly to shape the tree and remove any dead or crossing branches. Protect young trees from frost using frost cloths or by bringing container plants
