The best growth has been in Besor, a cooler climatic region. Active growth continued for the next five months, until November. 7 degrees Celscius below freezing was enough to kill young plants. This will limit the number of sites it can be tried at. Dr. Mizrahi found germination could generally be started by removing the hard exocarp and treating the seeds with either ethylene or ethephon.
Germination is erratic, and takes place over an extended period.
Another report says seeds planted in a glasshouse germinated within one or two weeks when the hard outer exocarp was removed. Other Ricinodendron species Ricinodendron heudelotii ssp. It is a quick to establish, fast growing, straight boled tree that is usually around 100 feet high, although sometimes it is much smaller. This species seems to be a relatively early and fairly successful colonizer of grasslands, in areas where farming has been abandoned. It is therefore most widespread in secondary forest, rather than mature primary forest.