Zanthoxylum simulans

RHS Plant Profile
Sichuan pepper
Sichuan pepper RHS

Other common names

Chinese pepper

Synonyms

Zanthoxylum bungei var. inermis

Shrubs Trees

A bushy, spiny, medium to large deciduous shrub or small tree. The ash-like leaves are up to 8cm long with up to 11 broad leaflets. Flat-topped sprays of small, yellow-green flowers are produced in early summer, followed by open clusters of small, red fruits that split open to reveal black seeds. Leaves, bark and fruit are all aromatic. May be grown as an edible - the seed pods can be dried and used as a condiment which is more pungent than black pepper

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

2.5-4 metres

Max Spread

2.5-4 metres

Size

Time to Maturity
10–20 years
Max Spread
2.5-4 metres
Max Height
2.5-4 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
West–facing or South–facing or East–facing
Exposure
Sheltered
Hardiness
H6

Colour & Scent

Fragrance Bark Foliage Fruit
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Rutaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Potentially harmful
Fruit are ornamental. Wear gloves and other protective equipment when handling. (This guidance applies to plants grown for ornamental purposes only and not those grown as edibles). Pets: Fruit are ornamental - not to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus
Zanthoxylum are broadly rounded to upright, spiny, deciduous or evergreen trees and shrubs. They have aromatic bark and leaves. Sprays of small green or yellow-green flowers appear in spring or summer, followed by small fruits that split to reveal seeds attached by short threads
Name Status
Correct
Plant Range
China, Taiwan, Korea

How to Grow

Cultivation

Grow in fertile, well-drained soil in full sun or light, dappled shade

Propagation

Propagate by seed, or root semi-ripe cuttings in midsummer with bottom heat, or take root cuttings in late winter

Suggested planting locations and garden types

  • Cottage and informal garden
  • Patio and container plants
  • City and courtyard gardens
  • Low Maintenance
  • Flower borders and beds

Pruning

Pruning group 1

Pests

Generally pest-free

Diseases

Generally disease-free