Citrus × aurantiifolia, commonly known as Mexican Key Lime, is a compact, highly productive citrus tree prized for its small, intensely flavored fruit. It’s a great choice for edible gardens, patios, or anyone looking to grow citrus in a manageable size.

The foliage is dense and glossy, with rich green leaves that create a lush, healthy canopy. The branches may have small thorns, adding a bit of character while also helping protect the fruit.

In spring and intermittently throughout the year in warm climates, it produces fragrant white blossoms that fill the air with a fresh citrus scent. These are followed by small, round limes with thin skins and a bright, tangy flavor that’s more aromatic and acidic than standard limes.

It has a naturally compact, somewhat rounded growth habit and can be kept at a smaller size with pruning, making it ideal for containers or smaller planting areas.

Citrus × aurantiifolia grows best in full sun and prefers well drained soil. It benefits from regular watering and feeding, especially during flowering and fruiting.

It typically reaches about 6 to 12 feet tall and wide, depending on pruning and growing conditions. It is well suited for USDA zones 9 through 11. The foliage is evergreen.

This plant has low toxicity, and the fruit is edible and widely used in cooking and beverages.

The flowers attract pollinators such as bees.

It is moderately deer resistant, though new growth may be browsed.

Citrus × aurantiifolia fits especially well into Mediterranean, tropical, and edible garden designs, where it can serve as both a focal point and a productive plant.

Expert Tip:

Place this in full sun and protect it from cold temperatures, because it is more sensitive to frost than many other citrus. Consistent feeding during the growing season will also help support strong fruit production.

— Nick from Rooted Theory