Japanese pepper (sansho)
Zanthoxylum piperitum
The citrusy, tingling pepper of grilled eel and shichimi; the spring leaves (kinome) garnish soups.
Hardiness: zones 6 to 9
Light: part shade
Size: about 10 ft tall, 8 ft wide
Harvest: August to September
From: Japan and Korea
Here: Hardy in the Lake Erie shore climate (zone 6b to 7a), so it can live outdoors in the ground.
Good for: food, pollinators, wildlife.
Native to: Japan & its islands, East Asia. Hardy in zones 6 to 9.
The story
Sansho is Japan's own pepper. The dried husks are ground over grilled eel and blended into shichimi, and the fresh spring leaves, kinome, are slapped between the palms to release their scent before topping soups and simmered bamboo shoots.
Planting
Part shade, moist, well-drained soil. Buy a nursery plant; seed is slow. Male and female plants are separate, so plant both for berries.
Growing
Little pruning; mind the paired thorns. Keep it watered in summer heat.
Harvest and use
Leaves in spring; green berries in early summer for tsukudani; red husks in autumn, dried and ground.
What to watch for
Thorny stems. The seeds inside the husks are gritty: grind only the husks.
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General guidance, not professional advice. Conditions vary by yard and year; for local specifics ask your county extension office. Never eat a wild plant you cannot identify with certainty. Traditional uses are shared as history, not medical advice. © 2026 Sean Priest · Irie Orchard. Terms & credits · Privacy · Home