Guidelines for cultivation of succulent plants. Between 2005 and June 2011 maintained by Herman and Yvonne who nowadays 'explore' The Green Cathedral of South Africa in Napier, Western Cape. Herman and Yvonne restored and extended the historical Soekershof Gardens in Robertson between April 2000 and June 2011.
Have a look here. Experiencing their flagrances is a different story. For that you will have to travel to this place by the British newspaper The Independent described as “Best Garden in Western Cape” (9 January 2010)