Find out how to find Umbrian truffles or actively participate in the olive harvest to produce your own native olive oil. Depending on the season. In Umbria, the seasons for truffle harvesting vary depending on the type. Here is a summary of the main periods: - Precious White Truffle (Tuber Magnatum Pico): from October 1st to December 31st. - Precious Black Truffle (Tuber Melanosporum): from December 1st to March 15th. - Bianchetto or Marzuolo Truffle (Tuber Borchii): from January 15th to April 30th. - Black Summer Truffle or Scorzone (Tuber Aestivum): from May 20th to November 30th. Each truffle has its own specific period, and it is important to respect these seasons to preserve the natural balance and quality of the product. They are not found everywhere, they grow mainly along the Tiber River in northern Umbria The best time to harvest OLIVES is between the months of October and December, when the olives change color and become red/purple.