Mirlitons (also called chayote) are planted as whole sprouted fruit, not seeds. You place the entire fruit into the ground at an angle, with the sprout end facing up, in a wide planting hole about 18 inches deep. The process is straightforward, but mirlitons have specific needs for trellising, timing, and soil that make the difference between a vine that produces heavily and one that never sets fruit.
When to Plant Mirlitons
Mirlitons are tropical plants with zero frost tolerance, so timing matters. In the Gulf South, where mirlitons have the deepest growing tradition, most gardeners plant sprouted fruit in late March through May, well after the last spring frost. The vines need a long, warm growing season because they don’t flower until day length begins to shorten in fall, and fruit needs another 25 to 30 days after pollination to reach maturity. That means an early frost in October or November can wipe out your harvest if you planted too late.
If you’re outside USDA zones 8 through 11, growing mirlitons becomes more challenging. The vines can grow as annuals in cooler zones, but they need at least 150 frost-free days and consistent warmth. Gardeners in zones 7 and below often start sprouting fruit indoors in late winter and transplant once nighttime temperatures stay reliably above 50°F.
How to Sprout the Fruit
You don’t crack open a mirliton to get a seed. The single flat seed inside sprouts while still enclosed in the fruit, and you plant the whole thing. To get a mirliton to sprout, place the fruit on its side in a cool, dry spot out of direct sunlight. A countertop, pantry shelf, or garage works. Within a few weeks, a green shoot will emerge from the wider end of the fruit. Some gardeners wrap the fruit loosely in a paper bag to retain moisture without encouraging mold.
Once the sprout is 4 to 6 inches long and you can see small roots forming at the base, the fruit is ready to plant. If you’re not ready to go outside yet, you can pot the sprouted fruit in a large container with potting soil to keep it growing until conditions are right.
Preparing the Planting Hole
Mirlitons develop extensive root systems and need loose, nutrient-rich soil to thrive. Dig a planting hole about 18 inches deep and three feet in diameter. That sounds large for a single fruit, but the wide hole gives you space to amend the soil properly and lets the roots spread without hitting compacted ground.
Mix the removed soil with generous amounts of compost or well-rotted manure before backfilling. Mirlitons prefer slightly acidic to neutral soil (pH 6.0 to 6.8) with good drainage. If your soil is heavy clay, adding compost and coarse organic material will improve both drainage and fertility. Fill the hole back in partway so that when you place the fruit, it sits with the sprout end angled upward and about 2 inches of soil covers the top of the fruit. The sprout should be pointing up and slightly outward, not buried.
Space multiple plants at least 10 to 12 feet apart. These vines get big.
Building the Right Trellis
A mature mirliton vine is heavy. It can easily cover a 15-foot span and produce dozens of fruit, each weighing close to a pound. Without a strong trellis, the vine sprawls on the ground, where fruit rots and pests move in. The support structure you choose is one of the most important decisions in mirliton growing, and the wrong material will actually stunt the vine.
The reason comes down to tendrils. Mirliton vines climb by wrapping thin, curling tendrils around whatever they touch. Those tendrils need wire or material that’s at least 1/8 inch in diameter to hook and coil properly. If the material is too thin (like string or chicken wire) or too thick (like fat wooden poles), the tendrils can’t grip and the vine won’t climb vigorously. Louisiana growers have tested this extensively, and the consensus is clear: cattle panels work best. They come in the right wire gauge and have a 4-by-4-inch mesh that lets fruit hang freely below the trellis.
The traditional Louisiana setup uses an overhead horizontal trellis built from 4×4 posts and 2×4 rails, topped with goat fencing or similar galvanized steel mesh in a 4-by-4-inch square pattern. This creates a flat canopy the vine grows across, keeping fruit off the ground and making harvest easy. If you don’t have room for a horizontal structure, any wire fencing at least 4 gauge (about 1/5 inch thick) mounted vertically against a fence or wall will work. Heavy concrete reinforcing mesh with 6-by-6-inch squares is another popular option.
When the vine is young and still too short to reach the overhead trellis, guide it upward using tomato cages near the base and 1/8-inch poly twine tied from the cage to the trellis above. Watch the tendrils closely in the first few weeks. If they’re not hooking and coiling around your material, the gauge is wrong.
Watering and Fertilizing
Mirlitons need consistent moisture, especially during the long vegetative growth phase from spring through summer. Water deeply once or twice a week, more often during hot, dry spells. The goal is evenly moist soil, not waterlogged. A thick layer of mulch (3 to 4 inches of straw, leaves, or wood chips) around the base helps retain moisture and keeps roots cool.
Fertilize every two months throughout the growing season. Here’s the critical detail: go easy on nitrogen. Too much nitrogen pushes the vine to produce enormous amounts of leaf and stem growth at the expense of fruit. A balanced or slightly phosphorus-heavy fertilizer encourages flowering and fruit set. If your vine is lush and green but producing no fruit by fall, excess nitrogen is the likely culprit.
Common Problems
Mirlitons are relatively tough compared to cucumbers and squash, but they share some of the same vulnerabilities. Cucumber beetles, squash bugs, and aphids all target mirliton vines. Check the undersides of leaves regularly, especially once the vine starts flowering. Handpicking larger insects and spraying aphids off with a strong stream of water handles most light infestations.
Powdery mildew can appear on leaves in humid conditions, particularly in late summer when airflow through a dense canopy is poor. Good trellis design helps here. An overhead trellis with open mesh allows air to circulate through the canopy, reducing the moisture that fungi need. Avoid watering from overhead, and remove any leaves that show white powdery patches early.
The biggest threat in most years is an early frost. Because mirlitons don’t flower until fall and need nearly a month after pollination for fruit to mature, a frost that arrives even a week or two early can destroy a crop that’s almost ready. If frost is forecast, draping the vine with frost cloth or old bedsheets can buy you a few extra degrees and a few more days of harvest.
Harvesting and Storing
Mirliton fruit is ready to pick 25 to 30 days after pollination, typically from mid-October through December in the Gulf South. Harvest when the fruit is 4 to 6 inches long, firm, and light green to white in color. Don’t wait for them to get large and tough. Younger fruit has a better texture for cooking.
Cut the fruit from the vine with a short piece of stem attached rather than twisting it off, which can damage the vine and the fruit. A single healthy plant can produce 50 to 100 fruit in a good season, so check the vine every few days once production starts.
Fresh mirlitons store well in the refrigerator for three to four weeks. For longer storage, peel, slice, and blanch the fruit before freezing. Save a few of your best, unblemished fruit for sprouting next spring. Store them in a cool, dry place where they won’t freeze, and they’ll start sending out shoots on their own when the time is right.