Genus: Zanthoxylum

There are many different Peppers but I think all the Peppercorn ones are tropical or Subtropical. Keep it fairly warm through the winter preferably with a moist atmosphere. A gravel tray beneath the pot or perhaps keep in Bathroom or Kitchen. Sorry I cant track down botanical name.

Seeds and plants can be obtained from mail order from the Agroforestry Research Turst, Hunters Moon, Dartington Devon. Contact details are on the web. They also hold very interesting forest garden walks and courses on Agroforestry.

Chiltern Seeds lists this plant.