Mashua is a remarkable tuber crop from the Andes that brings both productivity and ornamental beauty to cool-climate gardens. This vigorous vine, which can reach 8 to 12 feet tall, produces underground tubers while displaying attractive foliage and delicate flowers that bloom in fall. Hardy from zones 7 to 9, mashua thrives in full sun and offers gardeners a genuinely unique edible harvest from a plant that also adds visual interest to the landscape. The tubers themselves have been cultivated for centuries in South American highlands, and growing them at home connects you to an ancient food tradition that's only recently becoming more accessible outside its native regions.
Full Sun
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7-9
144in H x ?in W
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Mashua grows as an exuberant climbing vine that combines productivity with ornamental appeal, flowering from September through November as the tubers develop underground. The plant's vigor is striking, easily reaching heights of 96 to 144 inches, making it a presence in any garden space. Unlike many root crops, mashua rewards you with both nutritious tubers and the pleasure of watching a substantial vine establish itself through the growing season. This is a crop for gardeners who appreciate plants that work hard and look good while doing it.
The tubers are the edible treasure; they can be roasted, boiled, or incorporated into stews and soups, with a flavor profile that becomes more palatable after frost or proper storage. Some preparations involve parboiling to reduce any peppery notes that raw tubers can exhibit. The plant's lush foliage and flowering ability also make it valuable as an ornamental component in the edible garden, allowing it to serve double duty for gardeners with limited space.
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Plant seed potatoes or tuber pieces after the last spring frost when soil has warmed. Space plantings 12 inches apart along your chosen support structure, and bury tubers or seed pieces 3 to 4 inches deep.
Harvest tubers in fall, typically after the first frost, which sweetens them and makes them more palatable. Dig carefully around the base of the vine to unearth the tubers, which form in clusters underground. You can leave tubers in the ground through mild winters in zones 8 and 9, harvesting as needed, or dig all tubers before hard freezes in zone 7 and store for winter use.
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“Mashua, scientifically known as Tropaeolum tuberosum, originates from the mountainous regions of the Andes in South America, where it has been cultivated by indigenous peoples for generations as a staple food crop. The plant belongs to the Tropaeolaceae family, which includes the ornamental nasturtium, and shares that family's spirited growing character. Its journey from Andean farmsteads to gardens in temperate North America and Europe represents the slow but steady rediscovery of traditional crops by home gardeners and seed savers seeking alternatives to conventional vegetables. Today, mashua remains relatively uncommon in most regions, making it a genuine rarity for those committed to preserving agricultural biodiversity.”