Cocoa provides a living for over 6.5 million smallholder families, a significant source of revenue for a small number of tropical countries, and the key ingredient that sustains the chocolate industry. To keep pace with growing demand, annual cocoa production must rise by 1 million tonnes over the next decade. If that’s to happen, millions of hectares of old and unproductive cocoa gardens will have to be rehabilitated.This booklet provides a remarkable insight into how this is being achieved in one country. In 2003, Mars, Incorporated, one of the world’s largest chocolate manufacturers, launched a programme which has enabled many Indonesian cocoa farmers to more than double their yields and incomes. This has been done by encouraging them to adopt ‘good agricultural practices’, such as pruning and disease control, and the use of high-yielding varieties, either to replace their old trees or rehabilitate them through grafting.