His father was Ronald Tree, an American-born British journalist, investor and Conservative Member of Parliament (Member of Parliament) for the Harborough constituency in Leicestershire. His mother, Nancy Lancaster, was a niece of the Member of Parliament Nancy Astor through whom young Jeremy would be introduced to the sport of Thoroughbred racing.
Born into a prominent London, England family, Tree was always known by his middle name, Jeremy. Jeremy Tree was a paternal half-brother of the model Penelope Tree. He began training on his own at Newmarket Racecourse in 1952 then the following year relocated to stables at Beckhampton, Wiltshire.
Among his other top runners, Jeremy Tree trained Rainbow Quest to wins in the 1985 Coronation Cup and the Prix de l"Arc de Triomphe.
During his career, Jeremy Tree conditioned horses for prominent owners such as Charles West. Engelhard, Junior., Prince Khalid Abdullah and American John Hay Whitney. After forty-three years in racing, Jeremy Tree retired in 1989 to his home in Beckhampton.
