Key Lime
The Key Lime is a tropical treasure that brings both practical abundance and ornamental charm to any gardening space. Famous for its starring role in the iconic Key lime pie, this small-fruited citrus thrives in zones 2, 11 and produces fragrant pinkish-white blossoms followed by bright green limes within 1, 2 years of planting. Its compact growth, reaching 6, 12 feet tall and wide, combined with exceptional container adaptability makes it one of the most approachable citrus varieties for home gardeners in temperate climates.
Full Sun
High
2-11
144in H x 96in W
Perennial
High
Hover over chart points for details
What sets Key Lime apart is its remarkable flexibility. Whether you're growing it in a container on a patio, moving it indoors during winter, or planting it permanently in the ground where winters are mild, this tree adapts gracefully. The fragrant flowers are a bonus that arrives before the productive harvest, and the tree's moderate size means even space-limited gardeners can enjoy fresh limes year-round. Its pest-resistant nature and willingness to thrive indoors make it a workhorse for home citrus growing.
Key Limes are the traditional choice for making authentic Key lime pie, where their distinctive tart juice and aromatic zest shine. The small, intensely flavored fruits are also pressed for juice to season seafood, marinades, cocktails, and fresh salsas. Their compact size and thin skin make them ideal for juicing, and the zest carries a complex citrus aroma prized by cooks seeking depth beyond typical Persian lime flavor.
Key Lime trees are typically purchased as nursery specimens rather than grown from seed. When transplanting outdoors in temperate climates, choose a location with full sun exposure and well-draining soil. Plant in spring after the last frost date, and allow the tree to establish for a full growing season before expecting significant fruit production. If starting from a container, harden off the tree by gradually exposing it to outdoor conditions over 7–10 days before permanent planting.
Key Limes are ready to harvest when they turn from green to a pale yellow-green and yield slightly to gentle pressure. The fruits develop over many months on the tree, and you can harvest selectively as needed for cooking rather than waiting for a single flush. Pick limes with pruning shears to avoid damaging branches, and use them fresh within a few weeks or store them as described below. The tree will continue producing fruit over an extended season if kept healthy and well-watered.
Prune Key Lime trees lightly to maintain shape and remove any dead or crossing branches. Light pruning encourages bushier growth and more flower production, though avoid heavy pruning that removes too much foliage and fruiting wood. Indoor container specimens benefit from occasional tip pruning to maintain a compact, manageable size.
Enter your ZIP code to see a personalized growing calendar for this plant.
“The Key Lime carries the geographical stamp of its origin in its very name, it became famous through its connection to the Florida Keys, where it became a defining ingredient in regional cuisine and earned its place in culinary history. The variety's Mexican heritage ties it to a long tradition of lime cultivation in Central America, from which it eventually spread to the Caribbean and American tropics. Its adoption by home gardeners came largely through its reputation as a container-friendly alternative to larger citrus species, making tropical fruit growing accessible to those without dedicated orchards.”