If you want to maximize your garden’s calorie output and grow resilient, low-maintenance food, it is time to look beneath the surface. Edible tubers are underground energy storage units for plants, making them incredibly nutrient-dense and reliable crops. While almost every gardener grows potatoes, the underground world offers far more variety in flavor, texture, and climate adaptability.
Here are seven exceptional edible tubers you should add to your garden this year to diversify your harvest and your dinner plate. 1. Jerusalem Artichoke (Sunchoke)
Despite the name, this plant is neither from Jerusalem nor an artichoke. It is actually a native North American sunflower (Helianthus tuberosus). Jerusalem artichokes are incredibly prolific and produce knobby tubers with a sweet, nutty flavor reminiscent of water chestnuts. They can be eaten raw, roasted, or mashed.
Why grow it: They are virtually foolproof to grow, tolerate poor soil, and produce beautiful yellow flowers that attract pollinators.
Gardener’s tip: Plant them in a dedicated bed or use root barriers. They are perennial and can easily take over a garden if left unchecked.
Oca (Oxalis tuberosa) is a vibrant, colorful tuber native to the Andes. These small, wrinkled tubers look like multi-colored fingerling potatoes, ranging in shades from bright pink and yellow to deep purple. Oca has a tangy, slightly lemony flavor when harvested, which sweetens significantly if left to sit in the sun for a few days. They can be eaten raw in salads, boiled, or baked.
Why grow it: It is highly resistant to pests and diseases that typically plague standard potatoes.
Gardener’s tip: Oca is a day-length-sensitive plant. It only begins forming tubers after the autumn equinox, so it thrives best in regions with mild winters or where frost comes late. 3. Sweet Potato
While often confused with yams, sweet potatoes (Ipomoea batatas) belong to the morning glory family. Unlike regular potatoes, which prefer cooler weather, sweet potatoes crave intense summer heat. They yield high amounts of vitamins A and C, and their edible, lush green vines make an excellent summer groundcover.
Why grow it: They store incredibly well for months after curing, providing a stable food source through the winter.
Gardener’s tip: Grow them from “slips” (rooted vine cuttings) rather than buried tubers, and plant them in loose, mounded soil to give the roots room to expand.
Another hidden gem from the Andes, mashua (Tropaeolum tuberosum) is a climbing vine closely related to the garden nasturtium. It produces beautiful tuberous roots with a sharp, peppery, anise-like flavor when raw, which mellows into a savory sweetness when cooked.
Why grow it: Mashua is an exceptional companion plant. It naturally repels insects, nematodes, and bacterial pests, making it a living shield for your garden.
Gardener’s tip: Provide a sturdy trellis or fence for the vigorous vines to climb, which also helps maximize vertical space in small gardens. 5. Chinese Artichoke (Crosne)
Chinese artichokes (Stachys affinis) produce small, pearly-white tubers that look remarkably like coiled shells or caterpillars. Don’t let their unusual appearance fool you; they have a crunchy texture and a delicate, nutty flavor similar to artichoke hearts. They require no peeling and are excellent pickled, stir-fried, or tossed in butter.
Why grow it: They are a gourmet delicacy that is difficult to find fresh in standard grocery stores.
Gardener’s tip: They prefer moist, well-draining soil and partial shade in scorching hot climates. Harvest them late in the fall after the foliage dies back.
Yacón (Smallanthus sonchifolius) is a relative of the sunflower that produces massive, resinous tubers. Often called the “earth apple,” yacón tastes remarkably like a cross between a crisp apple, a pear, and celery. Because it contains fructooligosaccharides (a type of sugar the human body cannot easily absorb), it offers a sweet taste without spiking blood sugar.
Why grow it: It is a fantastic low-calorie, prebiotic snack that can be eaten fresh out of the ground.
Gardener’s tip: The plant grows into a large, attractive bush. At the end of the season, separate the large edible tubers from the small “red” crown tubers, which you save to replant the following spring. 7. Cassava (Yuca)
For gardeners in warm, tropical, or subtropical climates (USDA zones 8 and warmer), cassava (Manihot esculenta) is a staple worth growing. This woody shrub produces long, starch-rich tubers covered in a bark-like skin. It is the source of tapioca and serves as a primary carbohydrate source for millions worldwide.
Why grow it: It is incredibly drought-tolerant and thrives in poor, sandy soils where other crops fail.
Gardener’s tip: Cassava tubers contain naturally occurring cyanogenic glycosides and must never be eaten raw. Peeling and thoroughly boiling or baking the root completely neutralizes these compounds, making it safe and delicious. To help me tailor advice for your next steps, tell me: What climate zone or region do you garden in? How much sunlight and space does your garden get? Saved time Comprehensive Inappropriate Not working
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