Ornatec InternationalSpecies reference sheet ยท ornatecinternational.com
Zanthoxylum piperitum
Japanese Pepper
Zanthoxylum piperitum is the source of sansho, the citrus-sharp Japanese seasoning made from its split red husks. Japanese Pepper is a slow deciduous shrub of Japan, Korea and northern China, with finely divided aromatic leaves, paired spines at the nodes, and a clean structure that has made it a long-standing bonsai subject.
In the ground it is planted as a culinary hedge and a courtyard shrub, where the leaf scent released on brushing past is as much the point as the crop.
Specifications
- Height2 to 4 metres, occasionally to 5 metres
- Width1.5 to 3 metres
- Native toJapan, Korea and northern China
- FoliageAromatic pinnate leaves with small glossy leaflets, turning clear yellow in autumn; deciduous
- Growth rateSlow to moderate
Conditions
- SoilPrefers free-draining, humus-rich soils and dislikes waterlogging
- LightFull sun to partial shade
- WaterModerate; regular through the growing season
- ClimateThrives in warm temperate and cool subtropical regions and is reliably frost hardy
Additional Features
- FlowersSmall yellow-green flowers in spring, with male and female flowers borne on separate plants
- FruitSmall red husks that split to release a black seed, the husk being the source of sansho pepper
- UsesIdeal for culinary and ornamental hedging, courtyard and container planting, and bonsai
- SpacingPlant 1 to 1.5 metres apart for a hedge
- Low MaintenancePrune in winter to keep the frame open; note the paired spines at each node and site the planting back from paths
- Pest ResistanceGenerally sound, with citrus swallowtail caterpillar the usual visitor
- Cultural SignificanceOne of the fundamental seasonings of Japanese cooking, used since well before the introduction of chilli
- Frost ToleranceFully hardy and needs a cold winter to perform at its best
Japanese Pepper is a productive and aromatic hedge for cool-winter climates, and a fine bonsai subject in its own right.
Availability by project review. Sizes, quantities, origin and export readiness are confirmed after your plant schedule is reviewed against destination, timing and quarantine requirements. MEWA certified for supply into Saudi Arabia; Australian Export Registered Establishment.
Enquiries: sales@ornatecinternational.com
310 Donkin Rd, Utchee Creek QLD 4871, Australia
Prepared 09 September 2026