Lime Tree
Citrus aurantiifolia
The lime tree is a small, often thorny evergreen citrus grown for its aromatic green fruit. Key limes (Citrus aurantiifolia) and Persian limes are the most familiar types.
- Light
- Full sun
- Water
- Deep watering; let topsoil dry
- Difficulty
- Moderate
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Overview
Citrus aurantiifolia, the Key or Mexican lime, is a small, thorny, evergreen citrus tree producing fragrant fruit. The larger, seedless Persian lime (Citrus × latifolia) dominates commerce, while Key limes are prized for their aromatic fruit.
Limes are the most cold-sensitive of the common citrus but are productive, ever-bearing in warm climates, and well-suited to container culture where they can be sheltered from frost.
How to identify it
- Small, bushy, often densely thorny evergreen tree, 6-15 ft
- Small, oval, aromatic glossy leaves with a faintly winged petiole
- Fragrant small white flowers, sometimes purple-tinged in buds
- Small, round green fruit that yellows when fully ripe
- Key lime fruit is small and seedy; Persian lime is larger and seedless
Care & growing
Light: Full sun (8+ hours).
Water: Water deeply, then let the topsoil dry; limes dislike soggy roots.
Soil: Well-drained, slightly acidic soil (pH 6.0-7.0).
Temperature: Most frost-tender citrus—protect below ~32°F; ideal in zones 9-11. Excellent container subject indoors in cold regions.
Feeding: Regular citrus fertilizer with micronutrients; watch for yellowing from deficiency.
Propagation: Grafting for named types; Key limes can come fairly true from seed.
Habitat & origin
The Key lime originated in Southeast Asia and spread through the Middle East to the Mediterranean and, via Spanish colonists, to the Caribbean and Florida Keys.
Limes are grown throughout the tropics and subtropics—Mexico, India, Brazil, and Southeast Asia are major producers. They need a frost-free climate or winter protection.
Frequently asked questions
What's the difference between Key limes and Persian limes?
Key (Mexican) limes are small, seedy, and intensely aromatic; Persian limes are larger, seedless, and the common supermarket lime.
Can I grow a lime tree indoors?
Yes—limes do well in containers by a bright window or under grow lights, which also protects them from frost.
Why are my limes turning yellow?
Limes naturally turn yellow when fully ripe; most are picked green. Yellowing leaves, however, can signal nutrient deficiency.
Are lime trees frost-hardy?
No—limes are the most cold-sensitive common citrus and need protection below freezing, so container growing is wise in cool climates.
Lime Tree guides
In-depth guides for identifying, growing, and caring for Lime Tree.
