If you’ve ever bitten into a zippy spoonful of salsa verde and wondered what gave it that tangy magic, meet the tomatillo! Wrapped in a papery husk like a little garden gift, tomatillos are NOT green tomatoes but their own tart, tangy stars. These fast-growing, easy-care plants bring big flavor to your backyard and your kitchen. Tomatillos are a must-grow for any adventurous gardener or foodie. Let’s unwrap the secrets to growing these vibrant green gems—husk and all!
What Are Tomatillos?
Despite the name (tomatillo means “little tomato” in Spanish), tomatillos are not tomatoes but a separate species, Physalis philadelphica or Phsyalis ixocarpa. Common names also include Mexican ground cherry or husk cherry. The fruits are smaller than an average tomato, usually less than 2 inches in diameter. The plants, however, can grow quite large, some reaching 4 feet tall and wide.
Native to Central America, tomatillos grow wild in parts of Mexico and have been cultivated for hundreds if not thousands of years. Smaller than a standard tomato, the fruits are green and covered in a papery husk, called a calyx. Some varieties may ripen to yellow or purple.
Picked green, they have a tart, bright, almost citrusy flavor and are a good source of vitamin C. The most famous use for tomatillos is in making salsa verde, but don’t limit yourself to just one dish! Tomatillos are fantastic in chilis and soups, with eggs and seafood, as an ingredient in salad dressings, preserved in jellies, added to guac, and grilled with meats.
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Planting
Full sun, hot weather, fertile, well-draining soil, and mulch are the ingredients for a large tomatillo harvest. You’ll need at least two tomatillo plants to get them to set fruit. They are not self-fertile. Plant them near each other to help your pollinators get the job done.
While you might find tomatillos in your local garden center, they are less common than tomatoes, so you may need to start them from seed. Don’t worry; they germinate reliably. If you find tomatillo starter plants at the nursery, choose stout-stemmed plants that have not yet flowered or started to fruit.
Tomatillos share many of the same pest issues as other nightshade family plants (tomatoes, potatoes, eggplants, or peppers), so crop rotation is important.
When to Plant Tomatillos
Tomatillos start readily from seed but must be hardened off before going into your garden.
- Start from seed 6 to 8 weeks before you wish to transplant them outdoors. They should have five leaves and a well-developed set of roots before being planted in the garden.
- Tomatillos enjoy the warmth and won’t grow well in cool temperatures. Soil temperatures should be about 60°F or warmer.
- Whether started from seed or purchased as nursery starts, plant tomatillos outdoors several weeks after your last frost. See our Planting Calendar for when to plant tomatoes in your location and plant your tomatillos at the same time.
How to Plant Tomatillos
A mature tomatillo can spread out to occupy about 6 square feet. Space plants every 2 feet, with rows 3 feet apart.
To start them from seed:
- Prepare your trays or cell packs with a pre-moistened seed starting mix. 50-cell trays work well, but whatever size you have on hand will do.
- Sow two to three seeds per cell, about a quarter inch deep.
- Cover with plastic wrap or a humidity dome to aid in retaining moisture.
- Place in a warm, bright location. Tomatillo seeds germinate best above 70°F. A heat mat under the tray will speed germination if your greenhouse or home is cold.
- Thin to one sprout per cell or equivalent spacing after seedlings are an inch tall. Snip them with scissors to avoid disturbing the roots of the remaining young plant.
To transplant tomatillos into your garden:
- Work about an inch of compost into the soil.
- Loosen any pot-bound roots.
- Like a tomato, plant young tomatillos deep. It’s okay, and even preferred, to bury a tomatillo transplant all the way up to the first set of true leaves. Deep planting encourages the rooting of tomatillos (and tomatoes) and provides a sturdy base for the young plant.
- Set your stakes or trellis at the same time as you transplant. Don’t wait too long, as I often do, and have plants sprawled all over the ground.
- The plants can be trained onto their supports as soon as they can reach them, and you’ll prevent root damage caused by driving stakes or supports through the roots later in the season.
Harvesting
- “Tomatillos are ripe when the fruit is firm and fills the papery husk. If green fruit turns yellow, it is overripe and less flavorful. The purple varieties are ripe when the green fruits turn purple and fill the husk,” explains Daniel Drost, a Vegetable Specialist at Utah State University.
- The fruits should be firm. Overripe fruit will be softer and not keep as well. Harvest (or check) once or twice a week once the fruits are ripening.
- Watch for the husks to begin turning from bright green to tan or faded green.
- Tomatillos will keep for 2 to 3 weeks in a paper bag on the kitchen counter or can be frozen for later use.
If you notice a sticky residue on the tomatillos, wash it off before eating.
Types
- Tomatillo ‘Purple’ grows vividly purple fruit sweeter than most green varieties. It is a favorite for eating fresh off the vine. The more sunshine, the ‘purpler’ the fruit.
- Tomatillo ‘Verde’ is an early maturing variety and a favorite for use in salsa. It can grow quite large, so a tomato cage or other support is helpful.
- Tomatillo ‘Tamayo’ is a tall hybrid plant that sets large, 2.5- to 3-inch diameter fruits.
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