Truffles are now found or grown in nearly all regions of the world with a mild Mediterranean climate. However, the most famous areas for truffle production are France, Italy, and Spain.
In addition to the above countries, there are now truffle-growing areas in Australia, New Zealand, the United States, Croatia, Sweden, the United Kingdom, South Africa and China, There are several other countries, such as Canada, where truffiéres have been planted, but have not yet produced certified truffles.
The first black truffles to be produced in the southern hemisphere were harvested in Gisborne, New Zealand, in 1993. According to Ian Hall, There are now 150 truffiéres in New Zealand, a few containing more than 10,000 trees. During the 2007/2008 season, the country produced about 100 kilograms of Perigord truffles. In Australia, the first black truffles were harvested in Tasmania in 1999, by Tim Terry, on his farm near Launceton. In Western Australian, the Wine and Truffle Co. is a predominant producer. Their farm is at Manjimup, in the extreme South-West corner of Australia. In 2008 they had an estimated harvest of 600 kilograms.
Spain does not have a history of truffle hunting, as France does. It was not until the 1950's that enterprising Frenchmen wondered if truffles could be found across the border. They were soon found in the plateaus of Catalonia and Aragon. Here are found native grown Tuber melanosporum, Tuber brumale, and Tuber Aestivum. The largest truffiére (truffle orchard) in the world is located near Soria, in Spain. Founded by Salvador Arotzarena, a Spanish businessman with a lifelong interest in truffles. It now covers 600 hectares and produces about 3 tonnes of truffles per year. Besides this large producer, there are growers associations, such as the one at Sarrion. this association has 148 members and the local business supports 7 truffle-tree nurseries, with about 1400 hectares under production. Read excerpts from The Truffle Book for more information.
In the United States, the prime growing areas are North Carolina and Oregon. In 1992, Franklin Garland of Hillsborough, North Carolina successfully cultivated Black Perigord Truffles. He has since established a truffle tree nursery which is supplying stock to North Carolina, Virginia, Tennessee and Kentucky. Read this article about Franklin Garland and Tom Michaels.
In the United Kingdom and in Sweden, the Summer Truffle, Tuber aestivum is native, and is also cultivated. In the U.K., attempts are also being made to cultivate the Perigord Black Truffle. A company called Truffle UK is advertising seedlings for sale, infected with either Tuber aestivum or Tuber melanosporum. They also announce that Black truffles are now being harvested.