Q: How is a Mexican Key Lime different from a regular (Persian) lime?
A: Mexican Key Limes are smaller, more aromatic, and have a more complex, bitter, and floral-tart flavor than the larger, seedless, and less flavorful Persian limes ( Citrus latifolia ). Key limes have thinner skins, contain a few seeds, and are the traditional choice for Key lime pie and premium cocktails.

Q: Can I grow a Key Lime tree in a pot?
A: Yes, absolutely. It is one of the best citrus trees for container growing. Use a large pot (at least 15-20 gallons) with excellent drainage. It will need to be moved indoors to a sunny location before the first frost in zones 8 and colder.

Q: When is the fruit ready to pick?
A: The fruit is best picked when it is fully green and feels heavy for its size. The skin will be smooth and taut. While it will eventually turn yellow, the peak flavor and acidity are at the green stage. The tree produces fruit year-round, with the heaviest yields in winter.

Q: Is it self-pollinating?
A: Yes, the Mexican Key Lime is self-fertile. You only need one tree to produce a generous crop of fruit. The fragrant flowers are also attractive to bees and other pollinators, which will help with fruit set.

Q: Why does my Key Lime tree have thorns?
A: Yes, the branches of the Mexican Key Lime tree are thorny. This is a natural characteristic of the species. Wear gloves when handling, pruning, or harvesting fruit from the tree. This also makes the tree a good choice for a living barrier.

Q: How much cold can it tolerate?
A: It is the most cold-sensitive of the commonly grown citrus. Mature trees can survive brief dips to 32°F (0°C) , but frost and prolonged cold will damage or kill the tree. It must be protected or brought indoors when temperatures drop below 40°F (4°C) in zones 8 and colder .