VegetableOnion
Heshiko Onion
Heshiko is a Japanese bunching onion that brings cold-hardy reliability and tender, pungent flavor to gardens across zones 2 through 9. This heirloom perennial produces elegant white stalks reaching 12 to 14 inches, ready to harvest in just 60 to 80 days. Open-pollinated and drought-tolerant, it thrives in containers, raised beds, or garden plots, making it one of the most adaptable scallions for northern and southern gardeners alike. The real magic lies in its ability to overwinter, returning year after year once established.
Photo © True Leaf Market
Growing Conditions
USDA Zone
2-9
Sunlight
Full Sun
Water
Moderate
Soil
Well-drained, Fertile Loam; Tolerates Moderate Fertility
Growth Stats
20 in
Height
Spacing
2
Plant Profile
Sunlight
Full Sun
Water
Moderate
Zones
2-9
Size
20in H x ?in W
Growth
—
Care
Low
Hover over chart points for details
Highlights
Heshiko's cold tolerance and perennial nature set it apart in the bunching onion world. Unlike many scallion varieties that demand replanting each season, this Japanese heirloom settles in and comes back, delivering tender white stalks with assertive, delicious flavor. It grows quickly, reaches harvestable size in under two months, and handles both greenhouse cultivation and outdoor beds with equal ease. The variety's drought tolerance means it forgives occasional dry spells, while its modest 2-inch spacing lets you pack dozens of plants into a small footprint.
Common Uses
Heshiko works as both a fresh scallion and a cooked onion, depending on when you harvest. Pull young plants whole for salads and garnishes, or wait until stalks thicken for slicing into soups, stir-fries, and noodle dishes where the white portions shine with their assertive, sweet-sharp flavor. The tender leaves are excellent raw or lightly wilted, while the white stalks hold their structure through gentle cooking. Because it overwinters, you can harvest fresh shoots in early spring before other onions appear, extending your season dramatically.
Growing Timeline
No timeline data available yet for this variety.
Care Instructions
Transplant Outdoors
Transplant seedlings outdoors when they have developed their first true leaves and soil has warmed slightly in spring. Space transplants 2 inches apart in rows 15 inches wide. Harden off seedlings gradually over 7 to 10 days before moving them permanently outdoors.
Direct Sow
Direct sow seeds in spring once soil is workable, or in late summer for fall and overwinter harvests. Press seeds lightly into soil surface or barely cover them, as Heshiko seeds germinate best with light exposure. Keep soil consistently moist until seedlings emerge.
Harvesting
Begin harvesting Heshiko 60 to 80 days after sowing, once white stalks have reached 6 to 8 inches tall. For tender young scallions, pull entire plants when stalks are thin and leaves are still narrow and delicate. For larger white stalks with more substance, wait until the plant has filled out more, then harvest by cutting just above soil level or pulling the entire plant. The perennial nature means you can also cut leaves multiple times from the same plant, allowing it to regrow for continued harvests throughout the season and into the following year. Once established, plants often send up new growth within weeks of cutting.
Growing Calendar
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Companion Planting
Ecology & Traits
Edible
Scientific Classification
Allium fistulosum
Family
Amaryllidaceae
Genus
Allium
Native Status
L48 (I)AK (I)CAN (N)
History & Origin
“Heshiko originates from Japan, where bunching onions occupy a central place in the culinary and agricultural tradition. As an open-pollinated heirloom, this variety has been saved and replanted by Japanese farmers and gardeners for generations, preserving its distinctive character and cold hardiness. Its journey to Western seed catalogs reflects the growing appreciation for regionally adapted, perennial vegetables that reduce annual input and provide reliable harvests year after year. The variety's survival and continued availability through seed companies like True Leaf Market speaks to its proven performance and the gardening community's commitment to maintaining heirloom genetics.”