Yes, Key limes are still grown in the Florida Keys, but the story is more complicated than a simple yes or no. While the iconic fruit originated in the Keys and gave the region its famous pie, today most Key limes sold in the U.S. actually come from other countries like Mexico, and local groves in the Keys are limited due to hurricanes and development. That said, you can still find small, authentic Key lime groves in the Keys, and the fruit remains a beloved symbol of the region.
What exactly is a Key lime?
A
Key lime (
Citrus aurantiifolia) is a small, round citrus fruit that is yellow when fully ripe, though they are often picked green. It is very acidic, aromatic, and seedy compared to the common Persian lime (the large, seedless green lime found in supermarkets). The Key lime is also known as the
West Indian lime or Mexican lime. Its strong, tart flavor is what makes the classic Key lime pie so special. The fruit is about the size of a golf ball, with thin, smooth skin.
Why are they called Key limes?
The name comes directly from the Florida Keys, the island chain that stretches off the southern tip of Florida. In the late 1800s and early 1900s, the Keys were a major center for lime production, and the small, tart limes grown there became known as Key limes. The name stuck even as commercial production moved elsewhere. The
Florida Keys were the first place in the United States where this lime variety was widely cultivated, so the region is forever linked to the fruit.
Are Key limes still grown in the Florida Keys today?
Yes, but in very small quantities. Commercial Key lime production in the Keys peaked around 1910, when a devastating hurricane destroyed most of the groves. After that, growers moved to mainland Florida and later to Mexico, which is now the world's largest producer. Today, you can still find a handful of small, family-owned groves in the Keys, particularly on
Key Largo and
Islamorada. They are a niche, specialty crop, often sold at farmers' markets or roadside stands. If you visit the Keys, you can buy fresh Key limes directly from growers, but you won't see large commercial plantations like you would for oranges in central Florida.
What is the difference between Key limes and Persian limes?
This is a common question. Here is a simple breakdown:
| Feature | Key Lime | Persian Lime |
|---|
| Size | Small (golf ball) | Large (baseball) |
| Shape | Round, slightly oval | Oval with pointed end |
| Color when ripe | Yellowish-green to yellow | Dark green (turns yellow if overripe) |
| Seeds | Many seeds (10-15 per fruit) | Seedless or very few seeds |
| Skin thickness | Thin, smooth | Thicker, slightly bumpy |
| Flavor | Very tart, floral, aromatic | Mildly tart, less aromatic |
| Acidity | Higher acidity | Lower acidity |
| Juice yield per lime | 1-2 tablespoons | 2-3 tablespoons |
| Uses | Key lime pie, cocktails, marinades | Everyday cooking, beverages |
The
true Key lime has a more complex, tangy flavor that many bakers and chefs insist is irreplaceable in a classic pie.
Where can you buy real Key limes?
Fresh Key limes can be hard to find outside of Florida. Here are the most common sources:
- In the Florida Keys themselves: Look for roadside fruit stands or visit a local farmers' market.
- Online: Some specialty citrus farms ship fresh Key limes across the country.
- Bottled Key lime juice: Many grocery stores carry bottled juice (often labeled "Key lime juice") in the juice aisle. This is the easiest substitute if you can't get fresh fruit.
- Frozen Key lime juice: Some brands sell frozen concentrate.
When buying bottled juice, check the ingredients to make sure it is 100% Key lime juice, not a blend with Persian lime or added sugar. One popular brand is
Nellie & Joe's Key West Lime Juice, which is widely available and loved by home bakers.
For squeezing fresh Key limes, a small, hand-held citrus reamer works great. You can find a
citrus reamer for Key limes on Amazon if you want an easy tool for the job.
How do you use Key limes in cooking?
Key limes are famous for
Key lime pie, but they are also excellent in other dishes:
- Key lime pie (the classic: sweetened condensed milk, egg yolks, lime juice, and a graham cracker crust)
- Key lime marinades for fish or chicken (the acid tenderizes and adds flavor)
- Key lime margaritas or mojitos (a few squirts brighten the drink)
- Key lime vinaigrette (whisk juice with olive oil, salt, pepper, and a little honey)
- Key lime curd (like lemon curd, but with limes)
- Key lime bars (like lemon bars but with lime)
- Key lime sorbet or ice cream
Because the limes are small, you will need many of them. A standard 9-inch Key lime pie requires about ½ cup of Key lime juice, which is roughly 20-25 Key limes. That is a lot of squeezing! Many home cooks buy the bottled juice to save time. But if you want the freshest taste, nothing beats hand-squeezed juice from a real Key lime.
Can you grow a Key lime tree at home?
Yes, you can grow a
Key lime tree if you live in a warm climate (USDA zones 9-11) or in a container that you can bring indoors in winter. Key lime trees are small, reaching only about 6-10 feet tall when planted in the ground. They are more cold-sensitive than Persian lime trees, so they need protection from freezing temperatures.
Here are some tips for growing your own Key limes:
- Choose a sunny spot with well-draining soil.
- Plant in spring after the last frost.
- Water deeply but infrequently (allow soil to dry between waterings).
- Fertilize with a citrus-specific fertilizer 3 times a year.
- Prune to shape the tree and remove dead branches.
- Watch for pests like leaf miners and scale insects.
If you want to start a tree, you can buy a young Key lime tree from a nursery or online. A
Key lime tree starter plant is available on Amazon and can be shipped to your home.
Growing your own Key limes is rewarding, but remember that it takes 2-3 years for a young tree to produce fruit.
Why are Key limes so small and seedy?
That is just the natural genetics of the
Citrus aurantiifolia variety. The fruit is small because it is a different species than the larger Persian lime. The seeds are a result of the fruit's reproductive biology — Key limes are typically pollinated by bees, and each seed can produce a new tree. In contrast, many modern Persian limes are parthenocarpic (they develop fruit without pollination), which makes them seedless. The small size and many seeds are actually part of the Key lime's charm: they are a
true heritage citrus.
Are Key limes the same as limes in grocery stores?
No, almost all limes you find in a typical grocery store are
Persian limes (sometimes called Tahitian limes). They are larger, seedless, and have a milder flavor. If a recipe specifically calls for Key lime juice, the results will be different if you substitute Persian lime juice. The flavor will be less tart and less aromatic. Many bakers say the classic Key lime pie just isn't the same without the real thing.
How many Key limes do you need for a pie?
As mentioned, a standard 9-inch pie needs about ½ cup of juice. That's roughly 20-25 Key limes, depending on their size and juiciness. A good tip is to roll the limes on the counter before cutting to release more juice. You can also microwave them for 10-15 seconds to increase juice yield.
If you don't want to squeeze that many tiny limes, bottled Key lime juice is a perfectly acceptable substitute. Many professional bakers use bottled juice because fresh Key limes are seasonal and hard to find. Just be sure to buy
100% Key lime juice with no added sugar or preservatives.
Is Key lime pie actually from the Keys?
Yes, the classic
Key lime pie originated in the Florida Keys, probably around the late 1800s. The exact inventor is unknown, but the recipe likely came from early settlers who had easy access to Key limes, sweetened condensed milk (which was a shelf-stable staple), and egg yolks. The pie is a perfect example of using what is locally available. Today, it is the official state pie of Florida.
What is the best way to store fresh Key limes?
Fresh Key limes can be stored at room temperature for a week or in the refrigerator for up to two weeks. If you have a large batch, you can freeze the juice in ice cube trays and then transfer the cubes to a freezer bag. Frozen Key lime juice will last for 6-12 months and is perfect for making pies or cocktails anytime.
Are there any health benefits to Key limes?
Key limes are rich in vitamin C and antioxidants, just like other citrus fruits. They also contain small amounts of potassium, calcium, and fiber. The high acidity may help with digestion in some people, but it can also be hard on tooth enamel. As with all citrus, moderation is key.
Can you buy Key lime trees in the Keys?
Yes, you can find Key lime trees for sale at local nurseries in the Florida Keys. If you are visiting, consider bringing home a small tree (check agricultural regulations for your state — some areas restrict citrus movement due to diseases like citrus greening). Alternatively, you can order online as mentioned earlier.
For gardening, you may also need a
quality potting mix for citrus trees on Amazon if you plan to grow your tree in a container.
Summary checklist for getting started with Key limes
- ✅ Verify you are buying true Key limes (small, yellow-green, seedy) or 100% Key lime juice.
- ✅ For pie, use a recipe with sweetened condensed milk and egg yolks.
- ✅ Expect to use about 20-25 Key limes per pie if using fresh fruit.
- ✅ Consider buying a handheld citrus reamer to make squeezing easier.
- ✅ If growing your own, plant in warm climate or container; protect from frost.
- ✅ Frozen juice cubes save you future work.
The Florida Keys may no longer be the main commercial source of Key limes, but the fruit's connection to the islands is permanent. Whether you buy fresh limes from a Key West market or use bottled juice in a pie, you are enjoying a true taste of the tropics.
