A picture of a Castor oil tree

Castor oil tree

Kalopanax spp.

Also known as

Tree aralia

Kalopanax-pictus-leaves2 by Sten Porse (CC-BY-SA-3.0)

Full Sun
Moderate watering
Frost Hardy


RHS hardiness


Minimum temperature

Expected size





    • spring
    • summer
    • autumn
    • winter

    More images of Castor oil tree

    Kalopanax septemlobus 2
    Kalopanax septemlobus 02
    A photo of Castor oil tree

    Castor oil tree Overview

    Kalopanax is a genus with just 1 species of deciduous tree in the Araliaceae family. It is native to Northeastern Asia but naturalised in other regions. It produces spiny stems and large Fatsia-like, hand-shaped leaves and large umbels of small white flowers. Commonly known as Castor Aralia or Tree Aralia, the sole species is cultivated in temperate zones for its tropical appearance and surprising hardiness.

    How to propagate Castor oil tree


    Softwood cuttings in summer.

    Special features of Castor oil tree

    Attractive leaves

    Other uses of Castor oil tree

    Grown for its foliage and fruits.