Peg Putt was elected to the Tasmanian House of Assembly in 1993.
In 1986, Peg moved to Tasmania, where she became spokesperson for the Huon Protection Group which succeeded in stopping development of a new woodchip mill on the Huon River. She also founded the Tasmanian Threatened Species Network and was director of the Tasmanian Conservation Trust.
Peg entered the Tasmanian House of Assembly in 1993 after Bob Brown’s resignation. After the 1998 state election, she was the only one out of four Greens to retain a seat and became leader as a result.
In 2008, Peg announced her retirement as leader of the Tasmanian Greens, and from her seat in the House of Assembly. She was replaced as Greens leader by the party's deputy leader Nick McKim.
In 2011, Putt was placed on the Tasmanian Honour Roll of Women for her environmental advocacy.