The aim of this project was to investigate the viability of Greenlip Abalone ranching in Thorny Passage, near Port Lincoln, South Australia. Abalone ranching involves out-planting and growing juvenile Greenlip Abalone on benthic artificial reefs. This technique has been successfully developed and applied by Ocean Grown Abalone (OGA) in Western Australia. All of the sites tested in this trial were characterised by low survival and slow growth, relative to equivalent trials in Western Australia. After eight months, survival ranged from 5 - 31% and shell growth from 4-14 mm. High levels of predation and low food availability were considered the primary causes of poor survival and growth. A decision was made to terminate the trial after eight months, which was originally intended to run for 12-months.