The Impact Agency won the account following a three-way pitch. It replaces two-year incumbent agency The Yes Consultancy which closed earlier this year.
Jazz Apples are a fusion between Royal Gala and Braeburn apples and are grown in New Zealand, Europe and the UK.
The comms activity will include consumer exhibitions and sampling, a national and regional consumer PR campaign, sponsorship of the extreme sports athlete Tim Emmett and trade media activity.
The account will be headed up by The Impact Agency MD Linda Batt-Rawden.
The nine-strong agency's other current clients include San Miguel's Alhambra brand, Highgrove Foods and Anzac Biscuits.